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Formation of (Ca1−xSrx)2PbO4in Bi(Pb)‐Sr‐Ca‐Cu‐O system: Correlation with the formation of the 2223 high‐Tcphase

 

作者: M. Shiloh,   I. Wood,   M. Brown,   F. Beech,   I. W. Boyd,  

 

期刊: Journal of Applied Physics  （AIP Available online 1990）
卷期: Volume 68, issue 5  

页码: 2304-2307

 

ISSN:0021-8979

 

年代: 1990

 

DOI:10.1063/1.346535

 

出版商: AIP

 

数据来源: AIP

 

摘要:

X‐ray diffraction data of Bi1.4Pb0.6Sr2Ca2Cu3.6O10+xsamples show a sharp change near the annealing temperature of 845 °C. Below this temperature a solid solution of (Ca0.867Sr0.133)2PbO4is formed and prolonged annealing leads to transformation of the 2212 phase to the 2223 phase. Above this temperature, Ca2PbO4is formed, and prolonged annealing leads to an irreversible transformation of both the 2212 phase and the 2223 phase to the 2201 phase.

 

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