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

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	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
	2003
发表期刊	Applied Physics a-Materials Science & Processing
ISSN	0947-8396
卷号	77 期号:7 页码:915-921
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.
部门归属	chinese acad sci, inst phys, beijing 100080, peoples r china. chinese acad sci, ctr condensed matter phys, beijing 100080, peoples r china. sw univ sci & technol, inst min mat & appl, mianyang 621002, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;song, gb (reprint author), chinese acad sci, inst phys, beijing 100080, peoples r china;gbsong@aphy.iphy.ac.cn
关键词	Cu-o System Approximately 950-degrees-c Superconductivity Diagram Pr Growth Nd Prba2cu3o7-delta Praseodymium Property
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36023
专题	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.