Bi-Sr-Ca-Cu-O系超伝導体の高Tc相生成に及ぼすBa添加の効果

概要

論文の詳細を見る
The effect of partial substitution of Ba for Sr or Ca in the BiSrCaCu2Oy on the formation of the high-Tc phase was studied. A series of samples BiSr1-xBax CaCu2 Oy and BiSrCa1-x Bax Cu2 Oy, (x=0, 0.05, 0.1, 0.15, 0.2, 0.3, 0.5, 1.0) was prepared by the conventional ceramic method. The differential thermoanalysis and microstructural observation revealed that the substitution of Ba for Sr lowered the melting point and partial melting temperature and widened the temperature range of the partial melting with increasing Ba substitution(x≤0.1) for Sr. Tc measurements and X-ray diffraction analyses showed that the fraction of the high-Tc phase was at maximum when the BiSr1-x Bax CaCu2 Oy, (x=0.1) was sintered in the partial melting region. The partial substitution of Ba for Ca also lowered the melting point and partial melting temperature, but showed little effect on the formation of the high-Tc phase.
社団法人粉体粉末冶金協会の論文