Subsolidus phase relation and crystal structure in the Pr(1+x-y)Ba(2-x-z)Ca(y+z)Cu(3)O(7 +/-delta) system | |
G. B. Song ; J. K. Liang ; L. T. Yang ; J. R. Chen ; G. Y. Liu ; H. F. Yang ; G. H. Rao | |
刊名 | Applied Physics a-Materials Science & Processing
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2003 | |
卷号 | 77期号:7页码:915-921 |
关键词 | cu-o system approximately 950-degrees-c superconductivity diagram pr growth nd prba2cu3o7-delta praseodymium property |
ISSN号 | 0947-8396 |
中文摘要 | The Pr(1+x)Ba(2-x)Cu(3)O(7+/-delta) solid solution was investigated by means of X-ray powder diffraction combined with Rietveld analysis. A Pr123 single phase could be synthesized under Pr-rich conditions by sintering at 950 degreesC in air. The solubility range of Pr(1+x)Ba(2-x)Cu(3)O(7+/-delta) solid solution is 0.08 less than or equal to x less than or equal to 0.80. The structure of Pr(1+x)Ba(2-x)Cu(3)O(7+/-delta) for 0.08 less than or equal to x less than or equal to 0.30 is orthorhombic. The structure transforms into tetragonal for 0.30 less than or equal to x less than or equal to 0.80. To form the Pr123 single phase, the Ba sites in the Pr123 structure must have partial Pr ions, and the least amount is x = 0.08. Ba ions cannot occupy the sites of Pr ions. In the Pr123 structure, Ca ions can replace Pr ions; the highest value is x = 0.4 in the PrBa(2-x)Ca(x)Cu(3)O(7+/-delta) system under our experimental conditions. However, Ca ions cannot replace B a ions. The ionic radius plays a more important role than the chemical properties in the substitution between Pr, Ba and Ca ions in the Pr123 structure. |
原文出处 | |
公开日期 | 2012-04-14 |
内容类型 | 期刊论文 |
源URL | [http://ir.imr.ac.cn/handle/321006/36023] ![]() |
专题 | 金属研究所_中国科学院金属研究所 |
推荐引用方式 GB/T 7714 | G. B. Song,J. K. Liang,L. T. Yang,et al. Subsolidus phase relation and crystal structure in the Pr(1+x-y)Ba(2-x-z)Ca(y+z)Cu(3)O(7 +/-delta) system[J]. Applied Physics a-Materials Science & Processing,2003,77(7):915-921. |
APA | G. B. Song.,J. K. Liang.,L. T. Yang.,J. R. Chen.,G. Y. Liu.,...&G. H. Rao.(2003).Subsolidus phase relation and crystal structure in the Pr(1+x-y)Ba(2-x-z)Ca(y+z)Cu(3)O(7 +/-delta) system.Applied Physics a-Materials Science & Processing,77(7),915-921. |
MLA | G. B. Song,et al."Subsolidus phase relation and crystal structure in the Pr(1+x-y)Ba(2-x-z)Ca(y+z)Cu(3)O(7 +/-delta) system".Applied Physics a-Materials Science & Processing 77.7(2003):915-921. |
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