Composition for making sensor coatings based on aqueous suspensions of nanoparticles and method of preparing composition
SUBSTANCE: composition for making sensor coatings contains antimony-doped tin dioxide of the formula SbxSn1-xO2, where x=0.1-0.3, and water in ratio SbxSn1-xO2:H2O = 89-87:11-13 wt %. The method of preparing the composition involves hydrothermal treatment of tin and antimony hydroxides at 170°C for 48 hours. The tin and antimony hydroxides are obtained by dissolving Sn and Sb metal in concentrated hydrochloric acid, 18-20 wt %, while adding 3-5 wt % concentrated HNO3. The obtained solution is 2-3 times diluted with distilled water and a calculated amount of ammonia solution is added. Using a simple scheme, the disclosed method enables to obtain nanoparticles of said composition SbxSn1-xO2 with size of 30 nm and surface area of 154 m2/g, which can be used as the basic component of electroconductive ink for printing sensor arrays and microcontacts.
EFFECT: low labour and power consumption.
3 cl, 6 dwg, 3 ex
The technical field to which the invention relates.
The invention relates to inorganic chemistry, in particular to a method for producing suspensions of nanoparticles of tin dioxide doped with antimony SbxSn1-xO2(x=0.1, 0.2, 0.3) for the production of touch conductive ink for inkjet microprinting.
The advantage of the material obtained is that the resulting suspension are electrically conductive ink, which when "soft" coating can form a nanostructured active coating on microcontact area, which leads to a larger area of the gas sorption of the analyte and therefore high sensitivity gas-printed sensors.
The level of technology
Today, inkjet printing nanosuspension plays an important role in the creation of various planar structures. An important feature in the formation of nanostructured coatings with the given topology is the creation of approaches for obtaining liquid colloidal solutions based on semiconductor particles. In most cases this problem is solved by the detection of one or more synthetic approaches used by different precursors and conditions of the synthesis.
In the patent (CN 101209856 Yuhan Lin; Li Haidong; Nana Zhao; Mao Jun; Yandi Fan; Xiangling Ji Method for synthesizing tin oxide nanocrystalline by mould plate method combined wth hydrothermal condition) is considered a method of obtaining nanocrystalline SnO 2by combining the template technique with hydrothermal treatment. By varying the synthesis conditions can be obtained nanoparticles of various shapes (spheres, ribbons) and size.
Conductive SnO2high sensitivity is obtained by doping tin hydroxide of the metals Pd, Pt, Au, followed by hydrothermal treatment of the mixture, drying the resulting product and annealing (JP2008020411 Jun Tamaoki; Matsushiro Masaru, Manufacturing method for tin oxide gas sensor and a tin oxide gas sensor). Unfortunately, obtaining such composites based on SnO2and precious metals requires quite a long step-by-step syntheses. Ink for inkjet printing of transparent conductive films based on SnO2containing aqueous alkaline solution of stannic acid, in the patent (JP2005015608 Uchida Takashi; Sato, Hajime, Inkjet ink for forming transparent conductive tin oxide film), is obtained by dissolving tin acid in alkaline solution, followed by adding a water-soluble polymer. The difference of the patent from the proposed development is in a completely different way to obtain water-soluble ink and alloying of tin dioxide antimony to improve conductivity. Izvesteni methods of obtaining tin oxide doped with antimony by hydrothermal treatment of the hydroxides of tin and antimony (JP 62223019 Nishikura Hiroshi; Yamamoto, Shin; Yukio Terao, Crystalline tin-antimony oxide sol and production threof) or by annealing slurry containing compounds of tin and antimony (US4775412 Nishikura Hiroshi; Yamamoto, Shin; Yukio Terao Aqueous sol of crystalline tin oxide solid solution containing antimony, and production thereof), but they do not provide further possibility of their use as an ink for inkjet microprinting.
The technical result
At low labor and energy costs and simple technical execution of the obtained nanoparticles of tin dioxide doped with antimony composition SbxSn1-xO2(x=0.1, 0.2, 0.3) with a size of ~ 30 nm and a surface area of 154 m2/g, which makes them promising for use, as a main component in sensory and conductive inks for inkjet microprinting.
Summary of the invention the task was solved by the present invention. Composition for receiving a touch coatings based on aqueous suspensions of nanoparticles with a size of 30 nm SnO2according to the invention contains tin dioxide doped with antimony composition SbxSn1-xO2(x=0.1-0.3) and water with a ratio SbxSn1-xO2:H2O (89-87:11-13 wt.%). This goal is achieved by a different invention. The method of obtaining these compositions, including hydrothermal processing of hydroxides of tin and antimony at a temperature of 170°C for 48 hours.
The hydroxides of tin and antimony can be obtained by dissolving metallic Sn and Sb in concentrated hydrochloric acid (18-20 wt.%) with the addition of (-5 mass %) conc. HNO3and the resulting solution was diluted with distilled water 2-3 times and poured the calculated amount of ammonia solution.
Detailed description of the method of obtaining
Nanoparticles of tin dioxide doped with antimony composition SbxSn1-xO2where x=0.1-0.3, synthesized by hydrothermal treatment soosazhdennykh hydrated oxides of tin and antimony. Hydrothermal treatment was made as follows: Zadok was transferred into a Teflon vessel, placed in a steel autoclave, and was filled with water at about 80% volume. The autoclave was kept at 170°C for 48 hours, cooled and then extracted the received gray-blue suspension.
To confirm physico-chemical properties of the resulting suspension was having it cryochemical drying in sublimator Labconco Freezone 6 at a pressure of ~20·mbar, for which the original samples were diluted 10 times and was sprayed through a nozzle into liquid nitrogen. Frozen cryogeny tolerated in sublimator. Drying was continued for 2-3 days with a gradual increase in temperatures from -40°C to +40°C. the Annealing dried at room temperature samples xerogels were carried out in a tubular furnace (Nabertherm) in the temperature range of 300-700°C for 10-15 hours.
Analysis of the phase composition of the samples SbxSn1-xO2(x=0.1, 0.2 and 0.3), obtained after cryochemical with is the loud and annealing at 700°C for 15 hours, shows that they have the x-ray characteristic of the solid solutions with the structure of rutile, and do not contain appreciable quantities of impurities. (Fig.1). The increase in the degree of substitution of tin, antimony does not lead to significant changes of the lattice parameters, which is associated with an insignificant difference of ionic radii Sn4+and Sb5+in chetyrehmetrovaya environment.
The presence of alloying dioxide tin oxide, antimony confirmed by the characteristic blue - gray color of the suspension directly after the hydrothermal treatment, which is stored and after annealing.
The expected elemental composition of the xerogel was confirmed by the method of RSMA, in particular, to the total composition Sb0.1Sn0.9O2it can be estimated as Sb0.09(2)Sn0.94(5)O2.01(2)that clearly demonstrates an excellent match. Strongly broadened diffraction peaks of the solid solution is observed even in the initial samples received after cryochemical drying without additional annealing. This suggests that the formation of solid solution occurs already during hydrothermal processing.
A typical micrograph cryogenically dried suspension shown in Fig.2. Suspension there are two factions - ultrafine particles and their gel-like agglomerates. Existence is the existence of two fractions in suspension is also confirmed by dynamic light scattering. Figure 3 clearly shows the existence of two peaks in the distribution curve at ~30 nm and ~150 nm. The estimation of specific surface area, as one of the important factors that determine the dispersion of the obtained particles and the possibility of their practical use, gives a value of ~154 m2/g for sample Sb0.1Sn0.9O2". This value could be correlated with the detected microstructure characteristics and the distribution curve of the particle size.
The sensory properties of the xerogel was measured in the temperature range 100-200°C with periodic introduction of 0.8 ppm NO2in a stream of inert carrier gas. The electrical conductivity of the obtained particles SbxSn1-xO2(x=0.1-0.3) were tested using a two-prong method. To this suspension was applied onto a glass substrate, dried in an oven at ~100°C, and then tested the conductivity of the exposed film. The obtained samples had a resistance at the level of 10-100 Ohms when the distance between the measuring electrodes is ~1 mm and the film thickness of ~100-500 nm.
The invention is illustrated by the following drawings and examples.
1. The diffraction pattern of sample SbxSn1-xO2where x=0.1 after annealing at 700°C
2. Data REM for cryogenically dried suspension SbxSn1-xO2where x=0.1, consisting of ultrafine particles and their gel-like agglomerates
3. The distribution of particle sizes for sample SbxSn1-xO2where x=0.2, obtained by the method of dynamic light scattering.
Fig.4. The results of measurements of the conductivity of the sample SbxSn1-xO2where x=0.1 at different temperatures in the presence of NO2in the gas atmosphere.
5. Curves weight loss for the samples SbxSn1-xO2x=0.1 and 0.3 (b).
Fig.6. Microstructure printed by the suspension of nanoparticles SbxSn1-xO2on a silicon substrate using a standard inkjet printer.
Example 1. The hydroxides of tin and antimony were obtained from chloride tin (IV) and antimony (V), which was synthesized by dissolving metallic Sn and Sb in conc. HCl (18 wt.%) with the addition of conc. HNO3(3 wt.%). To the resulting solution was diluted with water 2-3 times was added ammonia to neutralize. Formed a loose white precipitate hydroxides of tin and antimony repeatedly washed with distilled water until a negative reaction to Cl-and NH4+. The xerogel obtained by hydrothermal treatment of hydroxides, has a remarkable touch signal (Fig.4.) in relation to nitrogen oxides and reaches values of R0/Rg=30-40 at temperatures from 100 to 150°C, where Ro- resistance in discomposure, Rgthe resistance in the atmosphere of NO2.
Example 2. The ink composition SbxSn1-xO2where x=0.1-0.3, obtained by hydrothermal treatment, characterized by the presence of water, after conducting a cryochemical drying according to the TGA mass loss occurs in two stages - first ends about 100°C (~6 wt.% from the original sample), and the second lasts from 200°C up to high temperatures (optional ~6 wt.%) (5A, b). The ink composition can be written as SbxSn1-xO2*H2Oh, where the ratio between SbxSn1-xO2:H2O be (89-87:11-13 wt.%).
Microprinting of planar structures on stainless steel and silicon substrate in the form of two parallel arrows thickness of about 200 nm (figure 6) was carried out using a standard inkjet printer (Epson) with a set of additional empty cartridges, which placed produced by the hydrothermal method of suspension SbxSn1-xO2, x=0.1-0.3.
The material proposed in the present invention, is of great interest for use as the main component of the electrically conductive ink for inkjet microprinting various objects by controlled distribution of micropore suspension, for example, to print touch matrices or point contacts.
1. Composition for obtaining touch the coatings based on aqueous suspensions of nanoparticles with a size of 30 nm tin dioxide, characterized in that it contains tin dioxide doped with antimony, composition SbxSn1-xO2where x=0.1 to 0.3, and water with a ratio SbxSn1-xO2:H2O equal 89-87: 11-13 wt.%.
2. A method of obtaining a composition according to claim 1, including hydrothermal processing of hydroxides of tin and antimony at a temperature of 170°C for 48 hours
3. The method according to claim 2, characterized in that the hydroxides of tin and antimony is obtained by dissolution of metallic Sn and Sb in concentrated hydrochloric acid, 18-20 wt.%, with the addition of 3-5 wt.% concentrated HNO3obtained solution is diluted with distilled water 2-3 times and poured the calculated amount of ammonia solution.
FIELD: machine building.
SUBSTANCE: sliding element with a pre-shaped substrate and galvanically applied anti-friction layer, formed of an alloy of tin, antimony and copper, whose content is in wt %: 5-20% antimony, copper 0.5-20% and the rest is tin, and lead content <0.7%, and the full content of other components is <0.5%, and in the layer of sliding bearing the tin crystals are of predominantly globular shape. Method of receiving a sliding element is that the electrolytic deposition of antifriction layer of an alloy with the components of tin, antimony and copper is carried out, and an electrolyte as a wetting agent preferably contains C13C15-oxo-alcohol, C16C18-fatty alcohol C18-oxo-alcohol with degree of ethoxylation from 10 to 30. The composition and deposition rate are adjusted by addition of auxiliary substances with large molecules, resulting in increased anti-friction layer and emerging of crystals of tin of a globular shape.
EFFECT: creation of the layer for a sliding bearing with improved operating characteristics.
10 cl, 1 ex
SUBSTANCE: antifriction alloys on tin basis are used for pouring of bearings. The alloy contains, wt %: copper 7.5-8.5, antimony 7.5-8.5, silicon 0.01-0.02, nickel 0.6-1.0, selenium 0.01-0.02, tin - the rest.
EFFECT: alloy is of high wear resistance.
SUBSTANCE: solder contains components in following ratio, wt %: tin 87.0-89.0; bismuth 9.0-11.0; stibium 0.8-1.2. Solder allows well technological properties, particularly, it allows high coefficient of conduction and well wettability of soldered coatings of crystal and basis of body.
EFFECT: reliability improvement of semiconductor power devices ensured by increasing of durability of soldered joints at thermocycling.
SUBSTANCE: invention can be used in the capacity of antifriction alloy of bearing lining. Alloy has following content, wt %: copper 6.0-8.0; antimony 8.0-9.0; zinc 0.5-1.5; silicon 0.2-0.3; gallium 0.01-0.03; indium 0.03-0.05; tin - the rest.
EFFECT: alloy wear resistance increasing.
FIELD: technological processes.
SUBSTANCE: solder can be used for low temperature soldering of objects from coloured and ferrous metals, particularly in the production of electrical and radio equipment. The solder contains the following components, in the given mass.%: antimony 0.6-1.2, copper 0.2-1.1, nickel 0.1-0.5, cerium 0.01-0.1, bismuth 1.0-5.0, lead 0.15-1.8, tin constitutes the rest.
EFFECT: increased durability of soldered joints; reduced defects when soldering and considerable increase in the life time and reliability of the soldered joints.
3 tbl, 3 ex
SUBSTANCE: solder can be used for low-temperature soldering of steel, nickel, copper and other alloys. The solder consists of the following components with the given percentage mass ratios: lead - 15.0-20.0%; antimony - 0.05-0.1%; indium - 0.3-0.5%; zirconium - 0.3-0.5%; boron - 0.05-0.1%; nickel 1.0-1.5%; tin constitutes the remaining percentage.
EFFECT: better quality of the solder due to its increased strength.
SUBSTANCE: solder can be used for soldering copper, copper-nickel alloys, and bronze. The solder consists of the following components with the given percentage mass ratios: copper - 3.0-3.5%; nickel - 0.5-1.0%; boron - 0.05-0.1%; antimony - 0.05-0.1%; iron - 0.2-0.4%; tin constitutes the remaining percentage.
EFFECT: obtaining of the limit strength of the solder.
FIELD: manufacture of joints by means of low temperature soldering, particularly in microelectronics.
SUBSTANCE: solder includes next relation of components, mass %: tin, 76 -96; copper, 0.2 - 0.5; silver, 2.5 - 4.5; indium, more than 0 - 12.0; bismuth, 0.5 - 5.0; Sb, 0.01 - 2. Solder features melting temperature range 175 - 210°C quite satisfactory for making electronic devices.
EFFECT: high ultimate strength and fatigue strength of solder that may easily wet metallic substrates.
SUBSTANCE: conductive paste contains frit glass, a conductive material, an organic medium and one or more organometallic components which form metal oxides when burnt. The organometallic components are selected from a group comprising a metal carboxylate and a metal alkoxide, where the metal is boron, aluminium, silicon, bismuth, zinc or vanadium. When deposited on antireflecting coating on a substrate, the conductive paste is capable of penetrating the coating to form an ohmic contact with the substrate. Described also is a photovoltaic cell, having a semiconductor substrate, an antireflecting coating and lines of a conductive mesh formed from said conductive paste.
EFFECT: high efficiency of the photovoltaic cell, improved adhesion and ohmic contact between metallic elements and the substrate through antireflecting coatings.
10 cl, 1 tbl, 2 ex
SUBSTANCE: present invention relates to use of a composition which contains: a) 0.1-20 wt % binder which contains a polycarbonate derivative based on geminally disubstituted dihydroxydiphenyl cycloalkane, b) 30-99.9 wt % solvent, c) 0-10 wt %, with respect to dry mass, dye or mixture of dyes, d) 0-10 wt % functional material or mixture of functional materials, e) 0-30 wt % additives and/or auxiliary substances or a mixture thereof, as jet printing ink. The invention also relates to a method of producing a composite and a composite which contains a polymer layer on which there is a jet printing layer of said composition.
EFFECT: invention is aimed at producing agents which enable to use jet printing in making counterfeit protected documents and/or valuable documents based on polycarbonate layers, and which enable to deposit jet printing layers on layers which meet all optical requirements, which can be coloured, wherein lamination does not deteriorate optical properties of the layers and said layers do not act as a separating layer and facilitate formation of a monolithic composite.
31 cl, 2 tbl, 2 dwg, 8 ex
SUBSTANCE: invention relates to jet printing inks, particularly non-aqueous inks for jet printing. The ink for jet printing contains a pigment, binder, polyetheramide resin as a pigment dispersant, an organic solvent and an anti-corrosion agent from an imidazole group or a group of volatile anti-corrosion agents, preferably dicyclohexylamine or cyclohexylammonium cyclohexylcarbamate.
EFFECT: disclosed inks have high dispersion stability and prevent corrosion of print heads of jet printers and nozzle clogging.
8 cl, 8 tbl, 34 ex
FIELD: food industry.
SUBSTANCE: proposed print compound in the form of print ink or print varnish includes a binding substance with a resinous component and a solvent component. The binding substance solvent represents a one-component or multicomponent saturated resin solvent and a food product or food additive of a number of monoglycerides and/or diglycerides and/or triglycerides. Preferably, the binding substance solvent component includes acetylated or esterified monoglycerides and/or acetylated or esterified diglycerides and/or acetylated or esterified triglycerides.
EFFECT: print ink solvent migration degree reduction and treatment simplification in view of the possibility of the print compound drying-out by way of absorption and re-varnishing exclusion.
4 cl, 3 ex
FIELD: printing industry.
SUBSTANCE: proposed invention relates to a printing item comprising a substrate and a combination of printed inks including six colours. Each of colours is defined with a full tone and a half-tone of the specified colour, at the same time each ink has a value of colour difference dE of the combined full tone L-C-H-a-b, which is less than or equal to 2, and a value dE of the combined half-tone, which is less or equal to 3.
EFFECT: invention provides for production of printing items, which reproduce patterns with high accuracy.
7 cl, 1 dwg
FIELD: textiles and paper.
SUBSTANCE: non-woven fabric is proposed, on the visible surface of which the ink composition is applied comprising from about 40 wt % to about 80 wt % of the dry weight of the ink of linking agent - aziridine oligomer with at least two aziridine functional groups. Also an absorbing article is proposed comprising a liquid-permeable upper layer, an absorbing core and a liquid-impermeable lower layer that contains the specified non-woven fabric with the said applied ink composition. The application of ink on the non-woven fabric can be carried out by the method of flexography or a method of ink-jet printing.
EFFECT: printed non-woven fabric has high resistance to abrasion even in case of its contacting with fatty substance.
16 cl, 2 dwg, 2 tbl, 2 ex
FIELD: printing industry.
SUBSTANCE: waterless ink composition for inkjet printing contains a pigment, a polymer in an amount of 1 to 20 wt % in terms of total weight, dispersing of pigment, organic solvent, and alcohol containing an amino group in an amount of 0.01 to 3 wt % in terms of total weight. The alcohol containing an amino group is selected from the group consisting of 2-amino-1-butanol, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-ethyl-1,3-propanediol and tris(hydroxymethyl) aminomethane. As the polymer the ink contains polyester, acrylic resin or polyvinyl chloride. The aqueous extract of the said waterless ink composition has pH ranging from 6.0 to 10.0.
EFFECT: increased stability of its pressure injection and the absence of clogging the nozzle of the print head with achievement of high quality printing.
7 cl, 1 tbl, 5 ex
SUBSTANCE: described is an activator of adhesion of ink to a substrate, containing a product of reaction of (a) a polymer solution or synthetic resin, (b) sulphonic acid or derivative thereof and (c) a metal compound selected from a group consisting of a metal halide, metal alkoxide, metal halide-alkoxide or a condensed metal alkoxide, where the metal is titanium or zirconium. The amount of sulphonic acid or sulphonic acid salt (b) and metal compound (c) corresponds to molar ratio of SO3X, where X is a H atom or a base residue, to Ti and Zr atoms ranging from 0.25:1 to 2:1. The invention also describes printing ink containing said adhesion activator.
EFFECT: reduced yellowing and smell of ink compared to ink which contains titanium acetyl acetonate as an adhesion activator while preserving effectiveness of the adhesion activator.
22 cl, 4 tbl, 15 ex
FIELD: technological processes.
SUBSTANCE: material marking method consists in the fact that there made is paint consisting of binding agent and fine microparticles and/or microencapsulated microdrops having diameter of approximately 40 to 80 mcm. Then, the mark having surface area of about one square centimetre and containing serial registration number is printed on the product by using the above paint. The above mark is lit with the light and chaotic character of distribution, shape and sizes of fine microparticles and/or microencapsulated microdrops are fully flashed; due to which non-reproducible and distinctive background card for the introduced mark is created. And data reads composed of the above background card are subject to filtration by using stop-down lens serving for neutralisation and suppression of any possible reflection of distortion of and damage to patterns, and then the above data reads subject to filtration are identified by means of optic-digital video camera interrelated with software, and view finder. At that, video camera has the possibility of transmitting the data to registration database for further comparison and confirmation of authenticity of the product marked in such a manner.
EFFECT: marking method allows high degree of protection of the product against false fabrication and copying.
10 cl, 2 dwg, 1 ex
SUBSTANCE: invention relates to manganese- and zinc-doped indium antimonides which can be used in spintronics, where electron spin is used as an active element for storing and transmitting information, forming integrated and microfunctional circuits, as well as designing novel magneto-optoelectronic devices. A magnetic semiconductor material is disclosed, which contains indium, antimony, manganese and zinc, and is indium antimonide InSb doped with manganese in amount of 0.12-0.19 wt % Mn and zinc in amount of 0.71-1.12 wt % Zn, and has the formula InSb<Mn,Zn>.
EFFECT: invention enables to obtain material which is characterised by Curie point of 320 K and combines semiconductor and ferromagnetic properties.
2 dwg, 2 tbl, 3 ex