| 摘要 |
PURPOSE:To obtain inexpensively and easily a superconductor having a critical point higher than the boiling point of liquid nitrogen, which is composed of a sintered product from a specifically composed oxide mixture of Al, Ba and Cu. CONSTITUTION:Oxides or carbonates of Al, Ba, and Cu such as Al2O3, BaCO3, and CuO, are mixed in amounts corresponding to the composition of the target sintered product, calcined, and crushed. The resultant powder is molded by compression and sintered to give a super conductor of a sintered oxide having a composition of the formula (1.0x<=y<=3.0x; 1.5x<=z<=4.5x; 2z<=w<=3z). |
