新規焼成法によるBi-Sr-Ca-Cu-O超伝導体110K相の合成

概要

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Attempts have been made to prepare the 110 K phase of Bi-Sr-Ca-Cu-O (BSCCO) superconductor oxide, however, synthesis of a pure phase in a short time remains difficult. In this work, unleaded BSCCO was synthesized by three previously reported methods (solid-state reaction, firing of coprecipitated powders and annealing of melt-quenched powders). Wavy temperature firing between two temperatures t_1 and t_2 for 10 min was performed. The 110 K phase was obtained in the temperature ranges of 845 to 875℃ in the solid-state reaction, 840 to 860℃ from the coprecipitated powders and 840 to 878℃ from the melt-quenched powders. Wavy temperature firing resulted in a better effect than normal firing at a constant temperature. Synthesis using fine powders obtained by coprecipitation showed the best results at low temperatures.
社団法人日本セラミックス協会の論文
1995-06-01