摘要:
A titanium or titanium alloy composite having a porous surface layer, which comprises a titanium or titanium alloy substrate and a porous titanium or titanium alloy layer that adheres strongly to said substrate, said porous layer being formed by first providing said substrate with a firmly adhering sinter of a mixture of a titanium or titanium alloy powder and a magnesium powder, and then removing magnesium from the sinter. A process for producing a titanium or titanium alloy composite having a porous surface layer, comprising: providing a coating composition comprising a binder added to a mixture of a titanium or titanium alloy powder and a magnesium powder; applying said composition to the surface of a titanium or titanium alloy substrate; heating the substrate at a temperature of from 650.degree. to 800.degree. C. in vacuo or an inert atmosphere so as to form a sinter of the powders of titanium or titanium alloy and magnesium which firmly adheres to said substrate; and removing magnesium from said sinter.
摘要:
A calcium phosphate-coated composite material is disclosed, comprising a metallic substrate, an oxide layer on the metallic substrate, said oxide layer consisting essentially of the oxide of one or more metals selected from the group consisting of titanium, zirconium, hafnium, niobium, tantalum, tin, cobalt, aluminum, chromium, molybdenum and tungsten, and a coating layer of calcium phosphate provided on the oxide layer. A process for production of the calcium phosphate-coated composite material is also disclosed.
摘要:
A process for electrolytic treatment of a metallic object by the liquid power feeding method comprising an electrolyte containing an organic acid or a salt thereof, an electrode comprising a substrate of corrosion-resistant metal and an electrode coating based on the presence of at least some iridium oxide and formed on the substrate, where such functions advantageously as a stable anode enjoying long service life.
摘要:
A cathode for electrolyzing acid solutions which comprises an electrically conductive metal substrate, a spray coated layer of a cathode active material containing tungsten, tungsten carbide or a mixture thereof in an amount of 10% by weight or more on the substrate, and an impregnation coated layer of 1 g/m.sup.2 or more of an acid-resistant fluorine containing resin on the outside surface of the coated layer of cathode active material, and a process for producing such.
摘要:
An electrolytic electrode which exhibits high durability when used in electrolysis in which the generation of oxygen is involved and a process for the production of same. The electrolytic electrode comprises (a) an electrode substrate of an electrically-conductive metal; (b) an electrode coating of an electrode active substance; and (c) an intermediate layer provided between the electrode substrate and the electrode coating, said intermediate layer comprising a mixed oxide of (i) an oxide of Ti and/or Sn having a valence number of 4 and (ii) an oxide of Ta and/or Nb having a valence number of 5.
摘要:
A method for forming an anticorrosive coating on the surface of a metal substrate, which comprises, in one embodiment, (1) coating the surface of the metal substrate with an anticorrosive metal capable of forming an alloy with the substrate metal and/or a hydride of the anticorrosive metal; (2) heating the coated surface, and then; (3) heating the coated surface in a vacuum or in an atmosphere substantially inert to the metal coating and the metal substrate by irradiating the coated surface with electron beams, laser beams or a plasma arc to sinter the coated metal and form an alloy layer in the interface between the metal substrate and the metal coating and, in another embodiment, subsequent to Step (2) and prior Step (3) above, coating the coated surface with a solution of a thermally decomposable platinum-group metal compound and then heating the resulting coated surface at about 40.degree. C. to about 600.degree. C.
摘要:
An electrode for use in the electrolysis of an aqueous solution of a metal halide, the electrode comprising an electrically conductive substrate and, formed thereon, a coating comprising(1) 50 to 95 mole % of platinum and(2)(a) 5 to 50 mole % of tin oxide, or(b) 5 to 50 mole % of tin oxide and cobalt oxide, wherein the tin oxide is present in an amount of at least 5 mole % and the cobalt oxide is present in an amount up to 20 mole %;and a process for producing the above-described electrode.
摘要:
A method of preparing a gas diffusion electrode comprising a diffusion layer, and a reaction layer arranged to each other, wherein the diffusion layer is prepared by i) admixing a) sacrificial material, b) polymer and c) a metal-based material and d) optional further components, wherein the sacrificial material has a release temperature below about 275° C. and is added in an amount from about 1 to about 25 wt % based on the total weight of components a)-d) admixed; ii) forming a diffusion layer from the admixture of step i); iii) heating the forming diffusion layer to a temperature lower than about 275° C. so as to release at least a part of said sacrificial material from the diffusion layer. A gas diffusion electrode comprising a diffusion layer and a reaction layer arranged to one another, wherein the diffusion layer has a porosity ranging from about 60 to about 95%, and an electrolytic cell comprising the electrode. An electrolytic cell, a fuel cell comprising the gas diffusion electrode and a metal-air battery comprising the gas diffusion electrode.
摘要:
When high purity silicon is produced through a gas-phase reaction between silicon tetra-chloride and zinc in a reaction furnace, the produce silicon is obtained as block or molten state. after the reaction in which the silicon is not in contact with air and reaction temperature is maintained at melting point of the silicon or less.
摘要:
When high purity silicon is produced through a gas-phase reaction between silicon tetra-chloride and zinc in a reaction furnace, the produce silicon is obtained as block or molten state. after the reaction in which the silicon is not in contact with air and reaction temperature is maintained at melting point of the silicon or less.