Use of Ga2O3 and In2O3 in forming superconducting glass-ceramics in the Bi-Sr-Ca-Cu-O system

Abstract

Glass-ceramic processing of Bi-Sr-Ca-Cu-O superconductors was improved through the addition of the intermediate glass formers gallium and indium. The gallium and gallium/indium additions produced Bi2Sr2Cu1O6 and Bi2Sr2CaCu2O8. The ϑx - Tg difference for the gallium and gallium/indium glasses was increased to 73 and 89 K, respectively, with optimum molar ratios for Bi2Sr2Ca2Cu3O10 (stoichiometric batch) : gallium = 1.0 : 1.0 and for Bi2Sr2Ca2Cu3O10 (stoichiometric batch) : gallium : indium = 1.0 : 0.9 : 0.1, respectively.