| 摘要 |
PROBLEM TO BE SOLVED: To provide a product superior in heat resistance and shock resistance and enable the repetitive use for flowing high currents by uniaxially pressure- forming a calcined powder containing V oxide as a main component into a desired shape, isotropically compressing the obtained uniaxially pressure-formed compact and regularly sintering it. SOLUTION: After dry mixing a main component V2O3 with Cr2O3 and metal Ni powder, a compact is formed, calcined in a gas flow of Ar/H2, pulverized in a wet ball mill, dried and granulated with an added binder, the powder is uniaxially pressure-formed at a pressure of about 2000 kgf/cm2, the molding is isotropically compressed, using a rubber press, i.e., the sample is put in a rubber bag and its periphery is isotropically compressed uniformly with a water pressure of about 2000 kgf/cm2 or more, and the obtd. isotropically compressed molding is baked in a gas flow of Ar/H2 to obtain a sintered body. |
