摘要:
The present invention is a metallic wire rod comprising iridium or an iridium-containing alloy and, the wire rod has in the cross section thereof biaxial crystal orientation of 50% or more of abundance proportion of textures in which crystallographic orientation has preferred orientation to direction. In the present invention, crystal orientation in the outer periphery from semicircle of the cross section which is the periphery of the wire rod is important, and in this zone, abundance proportion of textures in which crystallographic orientation has preferred orientation to direction is preferably not less than 50%.
摘要:
Disclosed an electrode for a polymer electrolyte electrochemical cell which comprises catalyst supports carrying catalyst particles, a first solid polymer electrolyte layer insoluble in water and an organic solvent formed on the particles and a second solid polymer electrolyte layer insoluble or soluble in the organic solvent formed on part of the surface of the first solid polymer electrolyte layer and a process of preparing same.
摘要:
An object of the present invention is to provide a conductive fine particle for producing a metal paste that can produce an electrode film having a low resistance, and a metal paste utilizing the conductive fine particle. The present invention is a conductive particle for electrode formation having a core/shell structure, and the conductive particle comprises a core particle made of Pt or a Pt alloy and having a particle diameter of 10 to 200 nm, and a shell made of a ceramic containing Al2O3 or ZrO2 and covers at least a part of the core particle, wherein the ceramic constituting the shell is added in an amount of 0.5 to 15% by weight based on the core particle to cover the core. The core particle is preferably Pt or a Pt alloy alloyed with Pd, Au, Ag, or Rh.
摘要翻译:本发明的目的在于提供一种用于制造能够制造具有低电阻的电极膜的金属膏的导电性微粒和利用该导电性微粒的金属糊。 本发明是具有核/壳结构的电极形成用导电性粒子,导电性粒子由Pt或Pt合金制成的粒径为10〜200nm的核心粒子和由陶瓷制成的壳体 含有Al 2 O 3或ZrO 2并且覆盖核心颗粒的至少一部分,其中构成壳的陶瓷的添加量为0.5〜15重量%,基于芯颗粒覆盖芯。 核心颗粒优选为与Pd,Au,Ag或Rh合金化的Pt或Pt合金。
摘要:
An object of the present invention is to provide a material for a precious metal tip of a spark plug, which has more excellent durability, particularly oxidation wear resistance than a conventional one. The precious metal alloy for the spark plug according to the present invention contains 0.2 to 6.0 wt. % Cr as an essential component, further at least any one of Fe or Ni, and the balance being Ir. Here, the amount of Fe and Ni to be added is preferably 2.0 to 12.0 wt. % in total. According to the present invention, the surface may be oxidized to form an oxide layer made from a Cr—Fe oxide, a Cr—Ni oxide or a Cr—Fe—Ni oxide. The oxide layer is formed by a diffusion treatment by heating the precious metal alloy at 300 to 900° C. in an oxidative atmosphere, and preferably has a thickness of 5 to 100 μm.
摘要:
Disclosed herein is a process of preparing a solid polymer electrolyte type fuel cell formed by combining a cathode current collector, a cathode containing cathode particles, an ion exchange membrane, an anode containing anode particles and an anode current collector characterized by comprising reducing a catalyst metal salt in an organic solution with the solid polymer electrolyte, depositing the reduced catalyst metal in the solid polymer electrolyte to form the cathode and/or the anode, interposing the cathode and/or the anode between the respective current collectors and the ion exchange membrane and pressing for assembling the fuel cell.Also disclosed is the same process as above except that the support is present in the solid polymer electrolyte.In the fuel cells prepared in accordance with the present invention, the catalyst metal always exists in the solid polymer electrolyte, and even if a cavity is formed in the solid polymer electrolyte, the catalyst metal is not exposed to the cavity. Accordingly, almost all the catalyst metals can be utilized to generate energy at the high efficiency.
摘要:
The present invention is a metallic wire rod comprising iridium or an iridium-containing alloy and, the wire rod has in the cross section thereof biaxial crystal orientation of 50% or more of abundance proportion of textures in which crystallographic orientation has preferred orientation to direction. In the present invention, crystal orientation in the outer periphery from semicircle of the cross section which is the periphery of the wire rod is important, and in this zone, abundance proportion of textures in which crystallographic orientation has preferred orientation to direction is preferably not less than 50%.
摘要:
An object of the present invention is to provide a conductive fine particle for producing a metal paste that can produce an electrode film having a low resistance, and a metal paste utilizing the conductive fine particle. The present invention is a conductive particle for electrode formation having a core/shell structure, and the conductive particle comprises a core particle made of Pt or a Pt alloy and having a particle diameter of 10 to 200 nm, and a shell made of a ceramic containing Al2O3 or ZrO2 and covers at least a part of the core particle, wherein the ceramic constituting the shell is added in an amount of 0.5 to 15% by weight based on the core particle to cover the core. The core particle is preferably Pt or a Pt alloy alloyed with Pd, Au, Ag, or Rh.
摘要翻译:本发明的目的在于提供一种用于制造能够制造具有低电阻的电极膜的金属膏的导电性微粒和利用该导电性微粒的金属糊。 本发明是具有核/壳结构的电极形成用导电性粒子,导电性粒子由Pt或Pt合金制成的粒径为10〜200nm的核心粒子和由陶瓷制成的壳体 含有Al 2 O 3或ZrO 2并且覆盖核心颗粒的至少一部分,其中构成壳的陶瓷的添加量为0.5〜15重量%,基于芯颗粒覆盖芯。 核心颗粒优选为与Pd,Au,Ag或Rh合金化的Pt或Pt合金。
摘要:
An object of the present invention is to provide a material for a precious metal tip of a spark plug, which has more excellent durability, particularly oxidation wear resistance than a conventional one. The precious metal alloy for the spark plug according to the present invention contains 0.2 to 6.0 wt. % Cr as an essential component, further at least any one of Fe or Ni, and the balance being Ir. Here, the amount of Fe and Ni to be added is preferably 2.0 to 12.0 wt. % in total. According to the present invention, the surface may be oxidized to form an oxide layer made from a Cr—Fe oxide, a Cr—Ni oxide or a Cr—Fe—Ni oxide. The oxide layer is formed by a diffusion treatment by heating the precious metal alloy at 300 to 900° C. in an oxidative atmosphere, and preferably has a thickness of 5 to 100 μm.
摘要:
Disclosed is an electrode structure for fuel cell having a carbon support of which an apparent density is between 0.05 g/cm.sup.3 and 1.2 g/cm.sup.3.In this electrode structure, the sufficient diffusion of gases can be secured because the sufficient cavities are securely formed in the catalyst electrode layer by the carbon support having a smaller apparent density or a larger porosity even if the thickness of the catalyst electrode layer increases.
摘要翻译:公开了一种具有碳载体的燃料电池的电极结构,其表观密度为0.05g / cm 3至1.2g / cm 3。 在该电极结构中,即使催化剂电极层的厚度增加,由于通过具有较小表观密度或更大孔隙率的碳载体的催化剂电极层中牢固地形成足够的空腔,因此可以确保气体的充分扩散。