收稿日期: 2012-04-17
修回日期: 2012-05-09
网络出版日期: 2012-05-09
基金资助
Supported by National 973 Project of China (2010CB833100) and National Natural Science Foundation of China (11105159,11075220)
Crystal structure and dielectric properties of functional electronic ceramic CaSrTiMnO6
Received date: 2012-04-17
Revised date: 2012-05-09
Online published: 2012-05-09
闫孟 , 谭艳清 , 肖小玲 , 胡中波 , 武梅梅 , 陈东风 . 功能电陶瓷材料CaSrTiMnO6的晶体结构和介电性能[J]. 中国科学院大学学报, 2013 , 30(3) : 322 -328 . DOI: 10.7523/j.issn.1002-1175.2013.03.007
CaSrTiMnO6(CSTM) dielectric ceramic was synthesized by the solid-state reaction method. Rietveld refinement results indicate that the ceramic has orthorhombic structure with space group pnma. Only one dielectric relaxation was found in CSTM ceramic, and it can be well explained by the mixed-valent structure (Mn3+/Mn4+) and normalized bond length theory. Within a temperature range from 333 K to 453 K, the value of dielectric constant was nearly stabilized at 4 000 in low frequencies, which suggests its wide potential application in the field of high-temperature and low-frequency dielectric devices.
Key words： perovskites; X-ray methods; Rietveld refinement; dielectric properties
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