Device of carbon nanotubes growth by method of ethanol pyrolysis

FIELD: chemistry.

SUBSTANCE: invention relates to devices for carbon nanotubes production. Device contains reaction furnace with unit for supplying and introducing of ethanol vapours, holder of padding with padding, which has catalytic surface, and heating element. Inside of reaction furnace placed is reaction chamber, which contains separable part, joint with drive of axial movement. Unit of ethanol vapours supply contains evaporating cell with ethanol, joint with ethanol vapours input. Heating element is placed inside reaction chamber in padding zone. Device is supplied with generator of particle flow, placed in reaction chamber, and made in form of at least one conductive net, connected to source of alternating or/and source of continued voltage. At least one conductive net is made of catalytic material. Reaction chamber is made of quartz ceramics. In evaporating cell heater and ethanol temperature measuring instrument are placed. Inlet of ethanol vapours is made of conductive material, and is connected to source of alternating or/and source of continued voltage. Inlet of ethanol vapours is made in form of two pipes, which are coaxially placed one in the other with ability to move relative each other.

EFFECT: increasing nanotubes quality and device reliability.

6 cl, 1 dwg

 

The device relates to the field of production of carbon nanomaterials and can be used to grow the material of carbon nanotubes, for example, for the exclusive production, research and training characteristics of the processes of cultivation.

A device of the growth of carbon nanotubes, comprising the reaction furnace module gas supply, which are the shaper of flow of the particles, the substrate holder with a substrate having a catalytic surface, and the heating element. This module gas supply is at an angle to the working surface of the substrate [1].

The disadvantage of this device lies in the fact that the module gas supply is at an angle to the working surface of the substrate, and this leads to an inhomogeneous distribution of the incident flux on the surface of the substrate and reduce the quality of the nanotubes.

It is also known device the growth of carbon nanotubes by pyrolysis of ethanol, comprising the reaction furnace with the feed module and the input of ethanol vapor, the substrate holder with a substrate having a catalytic surface, and the heating element [2].

This device is selected as a prototype of the proposed solution.

The first drawback is the lack of devices precision feed ethanol vapor, which leads to reduced the Yu precision adjustment process and, accordingly, the quality of the nanotubes.

The second drawback is that nereshennosti reaction chambers decreases their resistance to shock and vibration, and temperature gradients. In addition, such cells are more difficult to conduct routine cleaning. This reduces the reliability of the device, complicates its operation and also reduces the quality of the nanotubes.

The aim of the invention is to provide a simple and safe device for the growth of carbon nanotubes for research and use it in the educational process.

The technical result of the invention is to improve the quality of nanotubes and increase device reliability.

This technical result is achieved that the device of the growth of carbon nanotubes by pyrolysis of ethanol, comprising the reaction furnace with the feed module and the input of ethanol vapor, the substrate holder with a substrate having a catalytic surface, and a heating element inside the reaction furnace is hosted reaction chamber containing a detachable part, coupled with the drive of the axial movement, the feed module ethanol vapor contains evaporative cell with ethanol, coupled with the introduction of ethanol vapour, and the heating element is installed inside the reaction chamber in the zone padlock is, this shaper stream of particles that is installed in the reaction chamber made in the form of at least one conductive grid connected to an AC and / or DC voltage source, with at least one conductive grid is made of a catalytic material.

A possible variant, in which the reaction chamber is made of quartz ceramics.

There is also an option, where in the evaporation cell is installed heater and temperature meter ethanol.

There is a variation in which the input ethanol vapor is made of conductive material in the form of two tubes coaxially arranged one inside the other so that they can move relative to each other, and connected to a source of alternating voltage and / or constant voltage source.

The drawing shows a layout diagram of the device of the growth of carbon nanotubes.

The device of the growth of carbon nanotubes (figure 1) contains the reaction furnace 1, the inside of the reaction chamber 2 is made of quartz ceramics [3]. Chamber 2 consists of a cylinder 3 connected to the cover 4, installed on a welded, for example aluminum, the housing 5. Items 3, 4 and 5 are detachable part of the reaction chamber. Integral part of the reaction chamber consists of a work table 6, the United Sosnovaya 7. This connection can be made using the elastic spring clamps (not shown), heat-resistant glue, etc. Between the housing 5 and the substrate 7 is set Viton seal 8. It should be noted that the gap And between the base 7 and the housing 5 must be greater than the clearance B between the cylinder 3 and table 6. Camera 2 through the channel 9 is connected by a pipe 10 with booster pump 11. Between the pump 11 and the camera 2 has an electronic valve 12.

On the housing 5 is installed first 13 and second 14 housings in such a way that between them and the housing 5 is formed an air chamber 15, and 16. Mount housings 13 and 14 on the housing 5 made using spring hooks (not shown). The casing 13 is connected to the actuator 17 of the axial movement (shown conventionally, the actuator 13 may be mechanically connected to the housing 5).

As the actuator 17 can be used stepper motor, actuator, etc.

On the desktop 6 fixed object table 18 made, for example, titanium, quartz and the like, with the substrate 19 having a catalytic surface 20. Items 6, 18, and 19 can be bonded pads (not shown).

The catalytic surface 20 is made in the form of islets of Nickel, iron, etc. [4, 5] with a size of ~1 nm. As substrates you can use silicon, sapphire, polikor etc.

Inside the chamber 2 in the zone of the substrate 19 to set the flax heating element 21, performed, for example, in the form of nichrome spiral enclosed in a quartz screen (not shown).

The reaction furnace and, in particular, the reaction chamber 2 is connected to the feed module ethanol vapor 22 containing evaporative cell 23, mating pipe 24 with the introduction of ethanol vapour 25. The connection to the housing 5 with the input 25 may be effected by welding. In the cell 23 is filled ethanol 26, and between it and the input 25 is installed needle leak 27.

Inside the cell 23 can be installed heater 28 and the temperature meter 29. The heater 28 can be made in the form of a spiral of nichrome, and the meter 29 is in the form of a thermocouple. Cell 23 has a fill port (not shown) and is made of glass, quartz, etc.

It should be noted that the cell 23 may be missing the heater 28 and the meter 29. In this case, the cell 23 should be located so as to ensure direct supply of ethanol vapors in the chamber 2. For example, the cell 23 may be located above the input 25. Input 25 may be electrically conductive and consists of two tubes 30 and 31. When this tube 30 is vacuum-tightly fixed in the housing 5, and the tube 31 mounted therein for axial movement.

Axial motion of the tube 31 may be provided by means of spring elements between it and the tube 30 (not shown).

In one embodiment, the input 25 vacuumn is firmly fix the window 32, axis devices are semi-transparent mirror 33, the laser 34 and the light receiver 35 with the possibility of optical coupling with the substrate 19. As the radiation detector typically use screen, but can also be used spectrometer. In one embodiment, the elements 33, 34 and 35 mounted on a bracket (not shown), with the possibility of a shift away from a reaction furnace for easy removal of its detachable parts. The variant of the fastening elements 33, 34 and 35 directly on the body 5 (not shown). Cell 23 may be mounted on a bracket (not shown)and the pipe 24 should have sufficient length and flexibility to removal of detachable parts.

The pipe 10 connected to the electromagnetic valve leak 36 for inlet of air to the reaction chamber.

In the reaction chamber 2 is a flow shaper particles 37 (for example, in the form of nets [2]), a platinum-iridium thermocouple 38, and to it is connected a pressure gauge 39.

Items 11, 12, 17, 21, 25, 28, 29, 34, 36 and 38 can be connected to the control unit 40. The elements 25 and 37 can be connected to the unit constant and (or) AC voltage 41. When this input 25 in most cases kasemset.

The block 41 may be part of the block 40 and to be Autonomous.

The control unit 40 may be in the form of a microprocessor control system, ensure ivalsa job of setting the growth of carbon nanotubes on a given program and control the heating rate, temporary mode process, raising and lowering the upper part of the device, on and off the vacuum pump. Microprocessor control system is composed of the following modules: controller CMR - MT - 50; cost of the display and keypad DK - 50S; module optothyristors ILO-60. The control system is designed for storage of 100 individual programs. All programs stored in non-volatile memory. The display control system induces the program number set and actual temperature, the temperature on/off vacuum, the length of the process, the duration of the raising of the upper part of the camera, the shutter speed for cooling. Keyboard control system provides input to the program process, start and stop programs, raising and lowering the upper part of the cell growth of carbon nanotubes. Read more the control unit 40, see [7].

All mechanical and electrical leads from the reaction chamber 2 on the "atmosphere" sealed with Viton seals or adhesives "TorrSeal" "Varian" and "UHU plus company GmbH&Co.

The driver of the particle stream 37 may consist of one or more grids that are connected to the AC and or DC voltage. Its implementation is described in detail in the prototype. The difference lies in the use of catalytic materials, such as e, Ni, Co, Pt, Pd.

The device operates as follows. Using the actuator 17, raise detachable part of the reaction chamber. When using tubes 30 and 31 set the desired position of the tube 31 and the flow shaper 37 relative to table 6, set the substrate 19 with a catalytic surface 20 in table 6, after which the lower detachable part, aligning it at the end of the lowering, due to the gap A. Include the pump 11 and bring the residual pressure in the chamber 2 from 1 to 20 kPa. Then spend a short ~1 min washing chamber 2 pairs of ethanol and its annealing for ~10 min using a heating element 21, and the heating of the substrate 19 to a value of 900°C.

Serves pairs of ethanol in the chamber 2 using the needle leak 22. The required amount of vapor is determined by the residual pressure in the chamber 2 using a pressure gauge 39. It can be in the range of 1-20 kPa.

The supply of ethanol vapor in the chamber 2 may be due to its direct current from the cell 23, as well as due to natural evaporation in the evacuated volume of the chamber 2. The second version of the feed vapors carried out by heating ethanol in the cell 23 heater 28 to control the temperature meter 29.

Then hold the growth process of nanotubes according to the program control unit 40, maintaining a certain temperature of the substrate 19 and the concentration of ethanol vapor.

Process the OST nanotubes control, also shaping the field in the area of the substrate 19. There can be used various modes of use of fixed and variable fields. (See details in [2].) Unlike the prototype is to use the catalyst as materials grids. This leads to additional heating of the mixture, a more uniform distribution over the surface of the substrate and the preliminary catalytic decomposition of ethanol.

Control of nanotube growth is as follows.

Depending on the thickness of sediment on the substrate varies the magnitude of the reflected signal. The magnitude of the reflected signal depends on the chirality of carbon nanotubes. For example, tubes with metallic conductivity, growing on a metal substrate, practically do not change the magnitude of the reflected signal, but in upsetting their number usually does not exceed 30%. In the General case from the spatial distribution of the nanotubes on the substrate, their structure (single-walled or multi-walled), chirality (metal or semiconductor) changing the amplitude, polarization and frequency of the reflected light. These patterns are usually determined empirically. Fine structure of the Raman spectrum of excitation allows to judge about the diameter and length of carbon nanotubes. Device growth may be connected through the optical window using optolock the tion of the cable to the Raman spectrum (see details in [6]). Thus, the use of laser and analysis module enables you to monitor the progress of nanotube growth and to improve their quality.

After the process is finished, close the leak 27, block valve 12, to switch off the pump 11 and the heating element 21, cool the chamber 2 and produce overlap "of the atmosphere through the leak 36. Then raise the detachable part of the reaction chamber 2 by the actuator 17 and remove the substrate 19 with nanotubes.

The use of evaporative cells with ethanol allows to obtain high-quality nanotubes in relative safety and ease of process.

The use of a reaction chamber with a detachable part increases its resistance to shock and vibration, and temperature gradients. Additionally simplifies the operation and preventive cleaning of the chamber that leads to improving the quality of the nanotubes.

Placing the heating element in the area of the substrate allows the same heater to conduct heat of the substrate and the outgassing of the reaction chamber, which also increases the quality of the nanotubes. Use the shaper of particle flux in the form of at least one conductive grid, made of a catalytic material, stimulates the growth process of nanotubes.

Performing reaction chamber made of quartz ceramics provides a clean condition the conditions obtaining nanotubes. Besides quartz ceramics is a good heat insulator, and this simplifies the operation of the device.

Installation of evaporative cell heater and temperature meter ethanol allows fine adjustment of the feed gas mixture to the reaction chamber.

Performing input gas mixture of conductive material and connect it to the AC and or DC voltage extends electrophysical effects on the growth process of nanotubes.

Performing input gas in the form of two tubes coaxially arranged one inside the other, regulates the process feed gas mixture into the reaction zone, which is important for research purposes.

LITERATURE

1. Patent JP 2005187309, 14.07.2005.

2. Patent WO 2004065294, 05.08.2004.

3. Piwinski J.E., Romashin A.G. Quartz ceramics. M.: metallurgy, 1974

4. Bessonova AV, kolody P.P., Simonin MM "Growing carbon fibers by the Sol - gel catalyst by pyrolysis of gas phase ethanol" (report) // "industry of nanosystems and materials". Conference materials. M.: Moscow, 2005. - Pp.182.

5. Mosquitoes I.A., Schlegel IV, Simonin M. "methods of production of carbon nanotubes by the catalytic pyrolysis of ethanol" (article) // Nanotechnologies in electronics: Collection of scientific works /Ed. Have. - M.: Moscow, 2007. - 168 S.: ill. - is.88-92.

6. S.Maruyama, R.Kojima, Y.Miyauchi, S.Chiashi, M.Kohno. Lov-temperature synthesis of high - purity single - welled carbon nanotubes from alcohol. Chemical Physics Letters 2002, 360, p.229-234.

7. www.spark_don.ru.

1. Device for growing carbon nanotubes by pyrolysis of ethanol containing reaction furnace with the feed module and the input of ethanol vapor, the substrate holder with a substrate having a catalytic surface, and the heating element, characterized in that the inside of the reaction furnace is hosted reaction chamber containing a detachable part, coupled with the drive of the axial movement, the feed module ethanol vapor contains evaporative cell with ethanol, coupled with the introduction of ethanol vapour, and the heating element is installed inside the reaction chamber in the zone of the substrate, where the device contains shaper stream of particles that is installed in the reaction chamber, and is made in the form, at least one conductive grid connected to an AC and/or DC voltage source, with at least one conductive grid is made of a catalytic material.

2. The device according to claim 1, characterized in that the reaction chamber is made of quartz ceramics.

3. The device according to claim 1, characterized in that the evaporation cell is installed heater and temperature meter ethanol.

4. The device according to claim 1, characterized in that the input is ethanol vapor is made of conductive material and connected to a source of alternating voltage and/or DC voltage source.

5. The device according to claim 1, characterized in that the introduction of ethanol vapor is made in the form of two tubes coaxially arranged one inside the other so that they can move relative to each other.

6. The device according to claim 1, characterized in that the catalytic material is selected from a range of: Pt, Pd.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to microstructural technologies, namely to nanotechnology, in particular, to method of obtaining fibrous carbon nanomaterials which consist from carbon nano-tubes, by method of precipitation from gas phase. Reactor is filled with inert gas and its central part is heated. Then reaction mixture containing carbon source and ferrocene catalyst source is injected, which under impact of temperature turns into vapour. Vapour is kept in hot zone by ascending inert gas flow, source of padding for precipitation of catalyst nanoparticles and growth of carbon nano-tubes being introduced into reaction mixture. As padding source used are complexes of macrocyclic polyesters with salts of metals selected from line Ca, Ba, Sr, Y, Ce, which have temperature of decomposition lower than catalyst source, and serve as continuous source of padding.

EFFECT: synthesis of carbon nano-tubes is performed continuously, which results in increase of carbon nano-tubes output.

1 dwg, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to method for control and simulation of compaction of at least one porous substrate with pyrolitic carbon by chemical gas phase infiltration. According to the method, a lot of one or several substrates to be compacted is placed into furnace, the said substrate is heated, reaction gas containing at least one carbon-source hydrocarbon is supplied to the furnace, pressure, at which reaction gas is capable to diffuse into the heated substrate pores with formation of pyrolitic carbon residue, is established in the furnace, and waste gas is released from the furnace via exhaust pipe connected to the furnace outlet. In waste gas, content of at least one substance chosen from allene, propyne and benzene is determined. According to measured content, process is controlled by setting at least one of the following parameters: flow rate of reaction gas supplied to the furnace, flow rate of at least one component of gas supplied to the furnace, time of gas transit through the furnace, substrate temperature and pressure inside the furnace. At least one of parameters is set so as to provide for almost constant measured gas content. Compaction process can be either controlled in real time or simulated.

EFFECT: possibility of real-time control and simulation of process of compaction of at least one porous substrate with pyrolitic carbon using chemical gas phase infiltration.

12 cl, 8 dwg, 8 tbl, 10 ex

FIELD: technological processes.

SUBSTANCE: electrode that surrounds the receptacle and forms part of pressure reduction chamber intended for receptacle installation and electrode that is installed next to receptacle neck above its opening are installed one opposite to each other and separated with insulating body. This body forms part of pressure reduction chamber. Inlet tube of gas is made of insulating material for guiding gas that is supplied to the mentioned chamber with the help of supply facility of gas that is transformed into plasma for application of diamond-like film of coating onto receptacle wall internal surface. Tube is installed on facility for exhaust of gas that is available in pressure reduction chamber from the bottom part of receptacle part with opening. High-frequency supply facility is connected to electrode that surrounds receptacle, therefore, it is possible to freely ignite plasma and execute discharge.

EFFECT: stabilisation of plasma discharge and prevention of dust adhesion to electrode.

16 cl, 12 dwg, 2 ex, 2 tbl

FIELD: metallurgy.

SUBSTANCE: invention refers to plastic package with inside surface of wall coated with diamond-like film; invention also refers to device for fabricating this package and to method of package fabricating. The device contains an electrode encompassing the package and forming one portion of a chamber for pressure fall where the package and a facing electrode located inside the package above an aperture are arranged. The said electrodes face each other and are divided with an insulating body forming portion of the pressure fall chamber. A device for source gas supply contains an inlet pipe of supplied gas. There are also a pumping out device and a device of high frequency supply. The method includes pumping out the package contents till achieving the pressure less or equal to specified, then introduction of source gas for generating plasma, termination of pumping out and decreasing the rate of introduction of the source gas to the value less than the rate of introduction at the moment of change, generating plasma for formation of diamond-like carbon film on the interior surface of the plastic package wall. Thus the package with film is produced; the said film has equal level of oxygen impenetrability; and colouring of film formed at the throat portion of the package is avoided.

EFFECT: production of package with diamond-like carbon film with uniform level of oxygen impenetrability.

25 cl, 24 dwg, 7 tbl

FIELD: carbon particles.

SUBSTANCE: invention relates to technology of preparing particles having monocrystalline diamond structure via growing from vapor phase under plasma conditions. Method comprises step ensuring functioning of plasma chamber containing chemically active gas and at least one carbon compound and formation of reactive plasma, which initiate appearance of seed particles in the plasma chamber. These particles ensure multidirectional growing of diamond-structured carbon thereon so that particles containing growing diamond are formed. Functioning of plasma chamber proceeds under imponderability conditions but can also proceed under gravitation conditions. In latter case, seed particles and/or diamond-containing particles in reactive plasma are supported under effect of external gravitation-compensating forces, in particular by thermophoretic and/or optic forces. Temperature of electrons in the plasma are lowered by effecting control within the range from 0.09 to 3 ev. Chamber incorporates plasma generator to generate plasma with reduced electron temperature and device for controlling forces to compensate gravitation and to allow particles to levitate in the plasma with reduced electron temperature. This device comprises at least one levitation electrode for thermophoretic levitation of particles in plasma with reduced electron temperature or an optical forceps device.

EFFECT: enabled efficient growing of high-purity duly shaped particles with monocrystalline diamond structure having sizes from 50 μm to cm range (for instance, 3 cm).

19 cl, 5 dwg

FIELD: processes of chemical infiltration or chemical deposition from vapor phase, case hardening in furnace.

SUBSTANCE: method is used for monitoring process realized in furnace with use of gas reagent containing at least one gaseous hydrocarbon. Method comprises steps of adjusting working parameters of furnace; adding into furnace gas-reagent containing at least one gaseous hydrocarbon; discharging from furnace exhaust gases that contain by-products of gas-reagent reaction; washing out exhaust gases by means of oil that absorbs resins present in exhaust gases; receiving information related to process according to measured quantity of resins absorbed by oil. It is possible to change working parameters of furnace such as temperature, pressure in furnace, gas-reagent consumption and composition.

EFFECT: possibility for monitoring process in furnace without special apparatus of infiltration furnace.

14 cl, 1 dwg, 1 ex

FIELD: the invention refers to application of covers in a liquefying layer particular to an arrangement for settling covers in a liquefying layer.

SUBSTANCE: the arrangement for settling covers in a liquefying layer has a chemical reactor of a cylindrical form and a system of feeding with liquefiable gas, the inner surface of the cylindrical reactor is provided with vertical grooves located on ribs of regular polygons inscribed into the inner diameter of the reactor. At that the number of grooves is chosen in the limits 3-20, the grooves in the section have a form of an equilateral triangle and for a reactor with a diameter of 20-100 mm the relation of squares of transversal sections of the reactor and of all grooves is in the limits 100-200.

EFFECT: the invention provides stability of a liquefying layer at essential increasing of the particles' mass in the process of applying a cover.

1 cl, 1 dwg

FIELD: metal science; protection of materials against external and corrosive attacks.

SUBSTANCE: proposed method for producing diamond-like films designed for encapsulating solar photocells to protect them against chemical, radiation, and mechanical damage includes variation of ion kinetic energy, plasma discharge current, and spatial density distribution of plasma incorporating C+, H+, N+, and Ar+ ions by acting upon ion current from radial source with electric field built up by stop-down, neutralizing, and accelerating electrodes. Spatial plasma distribution is checked for uniformity by measuring plasma current density on solar photocell surface whose temperature is maintained not to exceed 80 oC. In the process substrate holder makes complex axial movement in three directions within vacuum chamber. Diamond-like films produced in the process on solar photocell surface area over 110 cm2 are noted for uniformity, difference in their optical parameters variable within desired range is not over 5%.

EFFECT: enhanced adhesive property, microhardness, and resistance of films to corrosive attacks.

5 cl, 12 dwg, 2 tbl

The invention relates to the production of carbon ceramic products with pyrocarbon coatings in chemical engineering, nuclear and electronic industries

FIELD: metallurgy.

SUBSTANCE: invention relates to powder metallurgy, in particular to obtaining samples to determine the best composition of a hard alloy. A layer of nanoparticles of tungsten carbide is laid on the layer of hard-alloyed mixture in the press mould or a layer of nanoparticles of tungsten carbide is placed between the layers of hard-alloyed mixture which is followed by pressing of the both layers. After sintering the mechanical and physical properties as well as structural parametres are evaluated by performing layer-by-layer measurements along the concentration axis including transition zones formed by diffusion of the nanoparticles into the hard alloy.

EFFECT: improved composition of the hard alloy with enhanced mechanical-and-physical properties and a low porosity.

4 dwg, 1 tbl

FIELD: physics; semiconductors.

SUBSTANCE: invention concerns processes of chemical machining of slices and can be used for creation of silicon bodies with nanosized structure, applicable as emitters of ions in analytical devices and for creation of light emitting devices. Essence of the invention consists in the reception method of nanostructure silicon base plates by processing of siliceous substances with a gas-vapor mix containing hydrofluoric acid and an oxidising substance, as an oxidising substance halogen or its mix with a oxygen-containing oxidising reagent taken in number of not less than 1.0% is used. Iodine can be used as halogen, and in quality of an oxygen-containing oxidising reagent - a reagent chosen from the group: ozone, peroxide, sulfuric acid, nitric oxide. The invention allows to Iodine can be used as halogen, and in quality of an oxygen-containing oxidising reagent - a reagent chosen from the group: ozone, peroxide, sulfuric acid, nitric oxide.

EFFECT: obtaining of base plates keeping stability of physical and chemical properties of a surface at long storage in natural conditions and providing high uniformity of physical and chemical properties of a surface and, accordingly, higher reproducibility of the analysis at use of such base plates.

8 cl, 6 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to microstructural technologies, namely to nanotechnology, in particular, to method of obtaining fibrous carbon nanomaterials which consist from carbon nano-tubes, by method of precipitation from gas phase. Reactor is filled with inert gas and its central part is heated. Then reaction mixture containing carbon source and ferrocene catalyst source is injected, which under impact of temperature turns into vapour. Vapour is kept in hot zone by ascending inert gas flow, source of padding for precipitation of catalyst nanoparticles and growth of carbon nano-tubes being introduced into reaction mixture. As padding source used are complexes of macrocyclic polyesters with salts of metals selected from line Ca, Ba, Sr, Y, Ce, which have temperature of decomposition lower than catalyst source, and serve as continuous source of padding.

EFFECT: synthesis of carbon nano-tubes is performed continuously, which results in increase of carbon nano-tubes output.

1 dwg, 3 ex

FIELD: nanotechnology.

SUBSTANCE: invention relates to nanotechnology and nanomaterials and can be used at receiving of inorganic and organic-inorganic fine-grained and nano-structured metallised materials, metal-polymers and nanocomposite. Suspension of organic-inorganic nanostructures, containing nanoparticles of noble metals, implemented in the form of poly-complex in two-phase reacting system, consisting of two volume contacting immiscible liquids. Poly-complex includes organic molecules, containing amides in amount 2 or more, and nanoparticles of noble metals. Suspension is received by means of forming of two-phase reacting system, consisting of two contacting volumetric immiscible liquids, addition in it of restorative and synthesis of nanoparticles. Additionally metallised molecules of precursors are dissolved in hydrophobic phase, reducer is added into aqueous phase, and in the capacity of ligands there are used organic molecules, into content of which there are included amides in amount 2 or more. Invention provides receiving of new nano-structured organic-inorganic polymeric complexes on the basis of polyamines, containing nanoparticles of noble metals (Pd, Au) of size up to 10 nm, which allows high specific surface area and are characterised by narrow dispersion of dimensions.

EFFECT: it is provided high density of particles packing in organic-inorganic nano-structures and high performance of transformation of initial material into nanoparticles of noble metals.

23 cl, 12 dwg, 1 ex

FIELD: nanotechnology.

SUBSTANCE: invention relates to nanotechnology and can be used for effective change of physicochemical properties of formed on nanoparticles surface inorganic nature of ligand envelope. For receiving of nanoparticles solution with ligand envelope into solution of metal salt in water or organic vehicle is successively introduced stabiliser solution, consisting ligands, and solution of reducer. After it is changed charge sign of ligand envelope by means of one-sided diffusion of substance molecules, changing charge sign of ligand envelope through the semipermeable membrane, into solution of nanoparticles. Additionally it is used membrane, allowing pores size less than size of nanoparticles, but more than size of substance molecules, changing charge sign of ligand envelope. In the capacity of stabiliser it is used substance, molecules' size of which less than size of semipermeable membrane pores.

EFFECT: it is provided receiving of nanoparticles with ligand envelope with specified properties.

2 cl, 2 ex

FIELD: metallurgy.

SUBSTANCE: invention relates to production of nanodisperesed metals in a liquid phase. One provides for passage of alternating current between electrodes immersed in a liquid phase and particles of metal being dispersed introduced into the interelectrode space. Ratio of the electrode length to the width of the spacing between the electrodes is equal to 20÷200:1. The electric current voltage and frequency are maintained at the level of 1.5-5.5 kV and 0.25-0.8 MHz accordingly. Additionally an inert gas is injected into the liquid phase in the form of bubbles sized 0.1-0.5 mm. The liquid phase is agitated due to continuous circulation of the liquid phase, particles of metal being dispersed and the inert gas within a looped circuit including the interelectrode space.

EFFECT: provision for extension of the functional capabilities of the method for production of nanodispersed metals in a liquid phase, its simplification, performance enhancement and improvement of working conditions.

4 cl, 14 dwg, 2 tbl, 9 ex

FIELD: technological processes.

SUBSTANCE: invention is related to the field of metal plastic working and may be used in manufacturing of multiplane pipelines for pneumatic hydraulic systems of aggregates and machines. Module for electropulse and sphere-dynamic power plasticisation of pipeline billet metal comprises device for electropulse processing and device for power processing with sphere-dynamic impact pulses. Device for electropulse processing comprises current collectors connected to generator of electric pulses, and two faceplates. Faceplates are connected by two vertical stands with elastic elements. One of faceplates has the possibility of reciprocal displacement along vertical stands. Device for power processing has two strikers. Working surfaces of strikers are arranged along differently directed curves of logarithmic spiral of Ya.Bernoulli with different lifting angles.

EFFECT: provision of generation of regulated field of compressive stresses in metal purified from dislocations, which guarantees preservation of geometry of pipelines made of billets.

2 dwg

FIELD: technological processes.

SUBSTANCE: invention is related to the field of metal plastic working and may be used in manufacturing of multiplane pipelines for pneumatic hydraulic systems of aggregates and machines. Pipe billet is exposed to initial impact pulses of sphere dynamic action. Pulses are applied to diametrically installed sections of external surface of billet along curve having shape of logarithmic spiral of Ya.Bernoulli. Moreover, deformation extent is provided on every side of billet along its whole length, which is identified from the given expression. Then series of electric current pulses are applied to billet with current density in pulse Q=(1.2…2.0) 104. Duration of electric current pulses action τ=(0.3…0.4) T, where: T is duration of action at pipe billet with initial impact pulses. Then secondary impact pulses of sphere dynamic action are applied on external surface of pipe billet. Value of deformation extent from every side of pipe billet from secondary impact pulses is identified from given expression.

EFFECT: provision of generation of regulated field of compressive stresses in metal purified from dislocations, which guarantees preservation of geometry of pipelines made of billets.

2 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to methods of applying electroconductive nanostructurised coverings with high electroconductivity and wear-resistance. Method includes supply of powder composition with reinforcing particles from four measuring apparatuses into supersonic stream of heated gas and application of powder composition on product surface. First, from first measuring apparatus reinforcing ultra-dispersive particles of ZrO2 with fraction from 0.1 to 1.0 mcm are supplied and product surface is processed until juvenile surface is formed. Then powder composition based on Cu or Al is applied on product surface by supplying powder from four measuring apparatuses. From the first measuring apparatus reinforcing ultra-dispersive ZrO2 particles are supplied, from the second - Cu or Al powder, form the third - reinforcing nanoparticles of quasi-crystalline compound of system Al-Cu-Fe, and from the fourth measuring apparatus - reinforcing particles Y2O3. Rate of heterophase flow during application of composition based on Cu or Al is changed within the range from 450 to 750 m/sec.

EFFECT: reduction of porosity, increase of wear-resistance, adhesive and cohesive strength of covering preserving its high electroconductivity.

4 cl, 1 tbl, 1 ex

FIELD: nanotechnology.

SUBSTANCE: invention is provided for nanoelectronics, analytical chemistry, biology and medicine and can be used for manufacturing of sensors, polymers and liquid crystals. Between volumes of liquid hydrocarbon composition and electrically conducting liquid it is formed boundary, on which there are actuated microplasmous discharges by means of voltage application between electrodes, located in these volumes. Using power supply with frequency 50 Hz, providing smoothly varying of preset voltage from 0 up to 4000 V, it is implemented anodic or cathodic high-voltage polarisation of boundary and high-temperature electrochemical conversion with formation of carbon-bearing nano-materials. In the capacity of liquid hydrocarbon compound can be used, for instance, benzol or octane; in the capacity of electrically conducting liquid - solution of potassium hydroxide, solutions of halogenides of alkaline metals. On boundary it can be located diaphragm, implemented of glass or from aluminium foil with oxide coating.

EFFECT: receiving the ability to implement controllable synthesis of carbon-bearing nano-materials.

8 cl, 6 dwg, 3 tbl

FIELD: carbon materials.

SUBSTANCE: weighed quantity of diamonds with average particle size 4 nm are placed into press mold and compacted into tablet. Tablet is then placed into vacuum chamber as target. The latter is evacuated and after introduction of cushion gas, target is cooled to -100оС and kept until its mass increases by a factor of 2-4. Direct voltage is then applied to electrodes of vacuum chamber and target is exposed to pulse laser emission with power providing heating of particles not higher than 900оС. Atomized target material form microfibers between electrodes. In order to reduce fragility of microfibers, vapors of nonionic-type polymer, e.g. polyvinyl alcohol, polyvinylbutyral or polyacrylamide, are added into chamber to pressure 10-2 to 10-4 gauge atm immediately after laser irradiation. Resulting microfibers have diamond structure and content of non-diamond phase therein does not exceed 6.22%.

EFFECT: increased proportion of diamond structure in product and increased its storage stability.

2 cl

Up!