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(14-x)SrCO3-xCaCO3-24CuO System to Synthesize Spin-ladder Compounds Sr14-xCaxCu24O41 Using DTA and XRD Techniques
Zeng Yi,Pan Fusu,Yu Zuxing,Xiong Rui*,Shi Jing*
Author NameAffiliationE-mail
Zeng Yi Department of Physics, Wuhan University, Wuhan 430072  
Pan Fusu Department of Physics, Wuhan University, Wuhan 430072  
Yu Zuxing Department of Physics, Wuhan University, Wuhan 430072  
Xiong Rui* Department of Physics, Wuhan University, Wuhan 430072 xiongrui@whu.edu.cn 
Shi Jing* Department of Physics, Wuhan University, Wuhan 430072International Center for Material Physics, Chinese Academy of Sciences, Shenyang 110016 jshi@whu.edu.cn 
Abstract:
The (14-x)SrCO3xCaCO324CuO system was investigated by means of differential thermal analysis (DTA) technique combined with the powder Xray 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 ℃. The intensity and the position of the first endothermic peak around 800 ℃ 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.
Key words:  Solid state reaction, Powder X-ray diffraction, Differential thermal analysis, Phase transformation
FundProject:
DTA和XRD用于(14-x)SrCO3-xCaCO3-24CuO系统合成spin-ladder化合物Sr14-xCaxCu24O41的研究
曾艺,潘复苏,余祖兴,熊锐*,石兢*
摘要:
采用差热分析(DTA)技术和粉末X射线衍射(XRD)技术研究了(14-x)SrCO3-xCaCO3-24CuO体系(x=0、0.4、2.8、5.6、8.4、11.2、13.6和14)的热分解和固相反应过程,第一次详细地分析了该体系的热行为与合成纯spin-ladder化合物Sr14-xCaxCu24O41的关系.实验结果表明,x≤5.6时,DTA曲线在1000℃以下显示了两个吸热峰,DTA曲线可分成三个阶段,分别对应于合成单相Sr14-xCaxCu24O41的固相反应过程;x≥8.4时,DTA曲线在100
关键词:  粉末固态反应  X射线衍射  差热分析  相图
DOI:10.1088/1674-0068/18/4/614-618
分类号: