RussianPatents.com
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Method of producing superconducting three-component boride. RU patent 2443627. |
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FIELD: process engineering. SUBSTANCE: invention relates to chemical industry, particularly, to production of new superconducting boron-containing compounds. Proposed boride including lithium, vanadium and boron and having transition to superconducting state at 27 K is produced by sold-phase high-temperature synthesis of initial components made up of the mix of vanadium and boron powders with molar ratio of 1:2 and 0.3-0.5 mol of metallic lithium at 1000°C in vacuum of 10-4 Pa for 5 minutes. EFFECT: production of new superconducting boron-containing compounds with transition to superconducting state at notably higher temperatures. 2 ex, 1 dwg
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Method for production of high-temperature superconducting material in lithium-antimony telluride mixture / 2442837 The invention relates to technology of production of superconductive materials in the 'metal-metal oxide' system and can be used to produce compositions with unique physical properties. The powder mixture containing antimony telluride and metallic lithium is heated in the reactor up to 250°C with the vacuum of 5x10-4 torr, exposed to such conditions for 2 hours and then it is cooled to ambient temperature. |
Way to get superconducting compound calcium-phosphor-oxygen / 2442749 Invention refers to the field of industrial chemistry and in particular to production of new superconducting compounds in the sphere of high pressures from 17 hPa to 160 hPa. Synthesis of the mechanical mixture of calcium with phosphor oxide P2O5 or of calcium with calcium phosphate Ca3(PO4)2 is performed. The mixtures of calcium with phosphor oxide and of calcium with calcium phosphate are characterized by the molecular ratio 1:1. The synthesis is performed under the pressure of 65 hPa during 3-5 µs and at the temperature of 800 K in the storage ampoule with the protective shroud made of stainless steel. |
Method for production of a high-temperature superconductor in system copper - copper oxide / 2441936 Invention refers to the technology of high-temperature superconductors production in metal-metal oxide system and can be used for production of compounds with special physical properties. The copper powder is oxidized in the reactor in the flow of dried oxygen with flow speed 20-30 ml/min with heating of the powder from the side of oxygen supply to the temperature 700°C for 3 minutes. The resulting sodium sample with the surface sodium oxide is cured at the temperature 1,000°C in vial under vacuum 5x10-4 torr for 1 minute and cooled down to room temperature. |
Method for production of a high-temperature superconductor in system sodium - antimony telluride / 2441935 FIELD: high-temperature superconductor production. SUBSTANCE: invention refers to the technology of high-temperature superconductors production in metal-metal telluride system and can be used for production of compounds with special physical properties. The mixture of antimony telluride powder and metallic sodium is heated in reactor under vacuum 5x10-4 torr to the temperature 200°C, aged for 2 hours and cooled down to room temperature. EFFECT: production of superconductor with the temperature of transition into superconductive state 45K with simultaneous increase of reproducibility of synthesis results. 1 dwg, 1 dwg, 1 ex |
Method for production of a high-temperature superconductor in system sodium - sodium telluride / 2441934 Invention refers to the technology of high-temperature superconductors production in metal-metal oxide system and can be used for production of compounds with special physical properties. Tellurium powder and metallic sodium is heated in reactor under vacuum 5x10-4 torr to the temperature 200°C, aged for 1 hour and cooled down to room temperature. |
Method for production of a high-temperature superconductor in system sodium-sodium oxide / 2441933 Invention refers to the technology of high-temperature superconductors production in metal-metal oxide system and can be used for production of compounds with special physical properties. The surface of metallic sodium sample is oxidized in the reactor in the flow of dried oxygen with flow speed 5-10 ml/min at the room temperature for 25 minutes. The resulting sodium sample with the surface sodium oxide is cured at the temperature 200°C in vial under vacuum 5x10-4 torr for 4 hours and cooled down to room temperature. |
Method for production of a high-temperature superconductor in system iron - iron oxide / 2441845 Invention refers to the technology of high-temperature superconductors production in metal-metal oxide system and can be used for production of compounds with special physical properties. The method involves partial reduction of fine powder of iron oxide Fe2O3 sized less than 50 μm to metal α-Fe while maintaining iron oxide FeO in each powder volume in the flow of dried hydrogen with the speed 100 ml/min at the temperature 350°C for 5 minutes and cooling at the room temperature. |
Superconducting wire of "sheathed cable" type (conduit cable) / 2413319 Superconducting wire of "sheathed cable" type (conduit cable) for windings of magnetic systems, including windings of thermonuclear fusion plant of TOKAMAK type, and windings of energy accumulators "SPIN". Wire comprises superconducting core and metal sheath. Channels for coolant pumping are provided between inner surface of sheath and outer surface of superconducting core. Sheath may be arranged as combined with inner part in the form of all-metal seamless pipe of aluminium or its alloys, and external part is made of steel or titanium. Channels to pump coolant between superconducting cores and shell may be formed by making inner surface of aluminium pipe as shaped with ribs or ledges. Channels may be formed by arrangement of gasket in the form of spiral wound onto core between superconducting core and sheath. |
Method for treatment of superconducting materials / 2404470 Method is based on generation of plasma flow in gas medium and its action at solid-state target, at the same time cumulative plasma jet is generated as focused by magnetic field in pulse mode with speed of jet outflow (4-10)·105 m/sec with provision of jet pressure at solid-state target in pulse of 105-106 atmospheres with temperature of more than 106°C and density of energy flow in plasma jet of 108-1010 W/cm2. As solid-state target is exposed to plasma flow, shock wave is developed in it, and energy of shock wave is sent through a layer of viscous medium to superconducting material. Plasma jet is generated in the medium of neon, argon or hydrogen, or nitrogen, or their mixture. Duration of pulse action of cumulative jet at solid-state target makes (5-10)·10-8 sec. As solid-state target, a plate of refractory material is used, and viscous medium is represented by epoxide resin without hardener or other viscous material with low pressure of saturated vapours. |
Superconducting wire and method of making said wire / 2403643 Invention discloses a superconducting wire and a method of making said wire, according to which the superconducting wire has different types of separators placed between an anti-diffusion pipe and modules, in order to ensure uniform deformation of the modules made from a copper matrix and niobium fibre in the middle of which a rod made from copper or copper alloy is inserted. In each gap formed between modules, different types of separators are also inserted in accordance with the shape of each gap. The copper separator or separator with low content of tin relative content of copper, in which the ratio of the cross sectional area of copper to the cross sectional area of tin is greater than 6.0, is placed between three modules, as well as between two modules and the anti-diffusion pipe, and a separator with high content of tin relative content of copper, in which the ratio of the cross sectional area of copper to the cross sectional area of tin is less than 0.01-1.5, or a separator with average content of tin relative content of copper, in which the ratio of the cross sectional area of copper to the cross sectional area of tin is less than 1.5-6.0, is placed between four modules. |
Method of producing aluminium nitride-based heat-conducting ceramic / 2433108 Invention relates to production of aluminium nitride-based heat-conducting ceramic which can be used in electronics and electrical engineering, particularly as substrate material for powerful microwave and power semiconductor devices, as well as other devices where there is need for good dielectric properties, strength and heat conductivity of the material. Powder of aluminium nitride with particle size less than 1 mcm, containing not less than 10% cubic phase of aluminium nitride with particle size less than 100 nm, and a technical additive selected from Y2O3, CaO, MgO in amount of not more than 6 wt % is used to prepare a mixture, with addition of not more than 65 vol. % organic component containing a solvent (mixture of methylethyl ketone with ethanol in ratio of 1:2), a dispersant (phosphate ether), binder (polyvinyl butyral) and a plasticiser (mixture of polyethylene glycol with dibutyl phthalate), followed by stirring with simultaneous deaeration for not less than 30 minutes rarefaction of air of not less than 0.15 atm. A belt is formed from the obtained slip, dried and cooled to room temperature. A plate is formed from the belt. The organic component is removed at temperature 150-500°C. The obtained half-finished product is sintered at pressure 0.1-1.0 MPa in the atmosphere of a nitrogen-containing gas at temperature 1650-1820°C for 1-3 hours and then cooled under given conditions. |
Superhard material / 2413699 Invention relates to production of superhard material which contains CVD diamond and which can be used in making a wheel dressing tool, a cutting, drilling tool etc. The surface of the CVD diamond is partially or completely covered by a shell under high pressure and temperature, where the said shell has a frame made from polycrystalline diamond (PCD) or polycrystalline cubic boron nitride (PCBN) with a bond between diamond-diamond grains or cBN-cBN grains, between which an activating additive is placed. The surface area of the shell surrounding the CVD diamond is not less than 40% of the surface of the CVD diamond; said shell contains 70-95 wt % PCD or PCBN and 5-30 wt % activating additive. If the shell is made from polycrystalline material based on PCD, the activating additive contains silicon and/or at least one transition metal, and if made from polycrystalline material based on PCBN, the activating additive contains aluminium and/or nitrides, borides and/or salicides of group IlIa, IVa, IVb, Vb, VIb, VIIb and VIII metals. The CVD diamond component of the superhard material can be polycrystalline as well as monocrystalline and can have different shapes and dimensions. |
Material of moistened cathode of aluminium electrolyser / 2412284 Material of moistened cathode of aluminium electrolyser consists of refractory compound of titanium boride and non-organic binding on base of high dispersed aluminium oxide moistened with liquid aluminium. Also, contents of titanium boride in finished material are not less 30 wt %. As binding on base of high dispersed aluminium oxide there is used "Al-corit-98" at amount of 10 wt %. It additionally contains electro-conducting powders of graphite or copper, or iron. |
Wettable cathode material for aluminium electrolysis cell / 2412283 Wettable cathode material for an aluminium electrolysis cell consists of titanium diboride wettable by liquid aluminium and binder - saturated solution of a hexa-hydrate of aluminium trichloride with ratio of titanium diboride to binder between 1:50 and 1:15. |
Method of producing polycrystalline cubic boron nitride / 2412111 Invention relates to production of synthetic superhard materials, particularly, polycrystalline cubic boron at high pressure and temperature to be sued in chemical, electronic and other industries. Proposed method comprises preparing mix of wurtzite-like and cubic modifications in relation of 1:4 to 2:1, respectively, processing it in planet mill for mechanical activation and crushing to grain size not exceeding 1 mcm, forming and annealing the mix at 1400-1800°C and 7.0-9.0 GPa, keeping at annealing temperature for time defined by conditions of transition on boron nitride wurtzite modification into cubic one without recrystallisation, equal to 5-30 s. Accurate time of keeping at preset temperature and pressure is defined proceeding from necessity of preservation of 5 to 15% of wurtzite boron nitride amount in initial mix. |
Method of making non-shrinking structural ceramic article / 2399601 Invention can be used to make articles from high-strength, non-shrinking ceramic materials working in high thermal-cycle loads in an oxidative, corrosive and aggressive atmosphere, and particularly in power generation installations. The starting material undergoes screening and deep cleaning. A mixture is prepared from components in the following ratio in mol %: boron nitride 12.5-17.5, aluminium 37-43, silicon carbide 42.5-46 and the mixture is mechanically activated. Primary workpieces are moulded from the mixture, dried and vacuum sintering is carried out at temperature between 1150 and 1250°C with residual pressure of 0.05 atm. The sintered workpieces are ground up and mechanically activated, after which articles are moulded and then vacuum sintered in conditions given above, mechanically processed, nitrogen hardened and oxidised. |
Method of obtaining composite material based on diamond and/or cubic boron nitride powder / 2393135 Invention relates to mechanical engineering and particularly to obtaining composite materials based on diamond and/or cubic boron nitride powder, which can be used, for instance as cutting elements in different instruments: drilling, driving instruments, in stone working instruments and instruments used in building industry etc. The method of obtaining composite material involves putting diamond and/or cubic nitride powder into a mould, packing and saturation with metals and/or alloys. The diamond and/or cubic nitride powder with different strength is used and packing is carried out at pressure whose value is selected from the condition Σst.>P>Σl st., where P is value of pressure during packing, Σst. is strength of powder with greater strength, Σl st. is strength of powder with less strength. |
Composite material for moistened cathode of aluminium electrolytic cell / 2371523 Composite material for moistened cathode of aluminium electrolytic cell relates to field of non-ferrous metallurgy and, particularly to production techniques of aluminium by method of electrolysis of cryolite-aluminous melts. Composite material consists of moistened by liquid aluminium high-melting compound - titanium boride and binding agent, where in the capacity of binding agent it is used high-aluminous cement, herewith correlation of components of titanium boride: cement is selected 9:1. |
Method of producing moulded aluminium oxynitride in burning mode / 2370472 Invention relates to making heat resistant ceramic materials, particularly to methods of producing aluminium nitride in burning mode. The method of producing aluminium oxynitride involves preparation of a reaction mixture of initial components, containing chromium (VI) oxide, aluminium oxide, aluminium and aluminium nitride, putting the reaction mixture into an SHS reactor in form of heat resistant material, made from quartz, graphite or stainless steel, ignition of the mixture with subsequent reaction of its components in burning mode under 0.1-10 MPa pressure in a nitrogen medium, or mixture nitrogen and air, or mixture of nitrogen and argon. After synthesis of the end product in form of an ingot, aluminium oxynitride is separated from the chromium aluminide ingot. Components of the reaction mixture are in the following ratio, wt %: chromium (VI) oxide 37.3-41.0; aluminium 31.0-34.0; aluminium oxide 22.7-25.0; aluminium nitride up to 9.0. A functional layer of aluminium oxynitride powder can be put between the reaction mixture of components and the wall of the mould. |
Method of connecting ceramic units from silicon nitride / 2365564 Invention relates to methods of connecting separate units from silicon nitride, which are used in manufacturing of constructional products, for instance nozzle apparatuses, long thermosteam covers and pipes (chlorine inputs), operating in aluminium melt at temperature 1200°C, glass-melting apparatuses for glass fibre stretching at temperature to 1600°C. Said technical result is achieved by the following: method includes preparing of glue mixture based on silicon nitride, which contains, wt %: 0.5-1.0 - melted magnesium oxide, 0.5-3.0 milted aluminuim oxide, 35-41 aluminiumboronphosphate binding agent and separately - similar mixture with alumochromephosphate binding agent, application on connected surfaces of units first mixture with aluminumboronphosphate binding agent, then mixture with alumochromephosphate binding agent with further coupling of said surfaces. Burning of connected product is carried out at temperature 1000°C with staying for 2 hours. |
Inorganic compounds / 2423319 Invention relates to synthesis of electroconductive metal compounds. Disclosed is a metal boride of the fourth secondary group of the periodic table of elements, the grain size, which is determined through sieve analysis according to the ASTM B 214 standard, of which is at least 40 wt % and particle size of which is greater than 106 mcm. The boride particles consist of grown monocrystalline grains. The method of producing said boride involves reaction of boron carbide with at least one oxide of a metal of the fourth secondary group of the periodic table of elements at temperature higher than 2000°C in the presence of carbon and a salt of an alkali or alkali-earth metal with high boiling point of at least 1800°C with excess boron carbide. The obtained boride can be included in the composition of a surface coating, a cermet and sputtered powder. |
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