(14-x)SrCO3-xCaCO3-24CuO system to synthesize spin-ladder compounds Sr14-xCaxCu24O41 using DTA and XRD techniques

被引：0
作者：
Zeng, Y
Pan, FS
Yu, ZX
Xiong, R [1 ]
Shi, J
机构：
[1] Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China
[2] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
来源：
CHINESE JOURNAL OF CHEMICAL PHYSICS | 2005年 / 18卷 / 04期
关键词：
solid state reaction; powder X-ray diffraction; differential thermal analysis; phase transformation;
D O I：
暂无
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
The (14 - x) SrCO3-xCaCO(3)-24CuO system was investigated by means of differential thermal analysis (DTA) technique combined with the powder X-ray diffraction (XRD) technique, and the relationship of its thermal behavior with the synthesis of spin-ladder compound Sr14-xCaxCu24O41 was first analyzed in detail. It is found that the DTA curve (x <= 5.6) exhibits two endothermic peaks and could be divided into three reaction stages, corresponding to the solid state reaction to synthesize single-phase Sr14-xCaxCu24O41. The DTA curve (x >= 8.4) shows three big endothermic peaks below 1000 degrees C. The intensity and the position of the first endothermic peak around 800 degrees C is depending on the content of CaCO3 in the system, while the third endothermic peak is the crucial factor of the synthesis of single-phase compound.
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页码：614 / 618
页数：5
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