On the Reactions of Quenched BaYCuO Powders with Various Materials

Abstract

The reactions of quenched BaYCuO powders (nominal composition: Ba 2 YCu 3 O 7- x ) with various materials (Al 2 O 3 , ZrO 2 , MgO, TiO 2 , SrTiO 3 , quartz, silica glass, Si, Ge and Nb) at 900°C were examined using X-ray diffraction analyses and measurements of superconducting properties and the new crystalline phases formed by the reactions were determined. It was found that the quenched BaYCuO reacted strongly with these materials and barium element was contained in the reaction phases. The relation between the crystalline phases and superconducting properties for the annealed samples has been discussed.