METHOD OF HIGH-TEMPERATURE SUPERCONDUCTOR PREPARING Russian patent published in 1994 - IPC

FIELD: electronic engineering, electrotechnical industry. SUBSTANCE: initial components are mixed and mixture prepared is subjected for thermal treatment in oxygen-containing atmosphere at 860-900 C. The source of Ba-Cu-containing component: mixture of barium cuprate BaCu₂O₂ with barium cuprate BaCuO₂ or copper oxide, or barium oxide, or peroxide, or nitrate, or carbonate barium. The source of Ln containing component: compounds of the series: Ln₂Cu₂O₅, Ln₂(CO₃)₃, Ln₂O₃, Ln(NO₃)₃. Positive effect: temperature of transition beginning to the superconducting state is 95-98 K, not less, T_o = 91-94 K, content of superconducting phase is 80-100% . EFFECT: enhanced quality of superconductor. 1 tbl