SYNTHESIS OF HIGH-TC 2223 PHASE IN BI-PB-SR-CA-CU-O SYSTEM BY SHORT-TERM FIRING

被引:0
作者
SHIMONO, I
KONISHI, H
KIJIMA, N
NAGATA, S
机构
[1] SHINSHU UNIV, FAC TEXT SCI & TECHNOL, UEDA, NAGANO 386, JAPAN
[2] MURORAN INST TECHNOL, MURORAN, HOKKAIDO 050, JAPAN
来源
NIPPON SERAMIKKUSU KYOKAI GAKUJUTSU RONBUNSHI-JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 1994年 / 102卷 / 06期
关键词
SUPERCONDUCTOR; BI-PB-SR-CA-CU-O; 2223; PHASE; SOLID-STATE REACTION;
D O I
暂无
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The high-T(c) 2223 phase in the Bi-Pb-Sr-Ca-Cu-O system has been synthesized by solid-state reaction. The processing parameters which give the largest volume fraction of the 2223 phase were found as follows. A mixture of Bi2O3, PbO, SrCO3, CaCO3 and CuO was pressed into a bar-shape and calcined at 1133 K for 5h, then cooled to 873 K with a cooling rate of 0.5 K/min. After being pulverized and pressed, the specimen was fired again at 1133 K for 5h and cooled to 873 K with a cooling rate of 0.5 K/min. With these simple synthesizing procedures, a superconducting sample which has a high T(c)-2223 phase volume fraction as high as. 91%, was successfully obtained. Our synthesizing method results in a much greater volume fraction of the 2223 phase than do conventional methods. The zero-resistance temperature of our sample was 102 K.
引用
收藏
页码:606 / 608
页数:3
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