梁 瑞興, 稲熊 宜之, 高木 喜樹, 中村 哲朗
日本セラミックス協会学術論文誌 : Nippon Seramikkusu Kyokai gakujutsu ronbunshi 96(1112) 501-502 1988年4月1日
The oxygen nonstoichiometry in the high T_c superconductor Ba_2SmCu_3O_<7-x> was determined over the temperature range of 350° to 900℃ under the oxygen partial pressure between 10^<-3> and 1 atm, with the thermogravimetric measurement calibrated by the iodometric titration technique. The temperature dependency of the nonstoichiometry indicates that a phase transition occurs at a temperature between 600°and 700℃.