| 摘要 |
PURPOSE:To facilitate manufacture of sintered superconductive material as a wire in practical application having high critical temp. by accommodating Mn2O7 in a metal cylinder together with material powder in a manufacturing process, in which material powder is sintered in the metal cylinder. CONSTITUTION:Mn2O7 dissolves at a temp. over 10 deg.C and emits oxygen to supply oxygen to the material powder which is required at the time of sintering. A plasticible metal cylinder is used with one end closed, and wire stretching or forging turns it into required form while the material powder is held in the cylinder at an appropriate density. Prior to filling of material powder, the Mn2O7 is attached to the inner surface of the metal cylinder, and it is desirable that the substance produced after supply of oxygen does not react with the sintered substance. By this method, a wire-shaped superconductive material having substantial mechanical strength is manufactured practically by the use of metal cylinder of Cu, etc., which is much cheaper than Ag favorable for supply of oxygen. |
