期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 93, 期 12, 页码 3986-3989出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1551-2916.2010.04177.x
关键词
-
资金
- Foundation of Doctorial Program in China [20070718004]
- National Science Foundation of China (NSFC) [20771070]
- Fundamental Research Funds for the Central Universities [2010ZYGX011]
Lead-free Sr2K0.1Na0.9Nb5-xTaxO15 ceramics were prepared using the conventional mixed-oxide method. The phase transition corresponding to the tetragonal ferroelectric (4mm) to paraelectric (4/mmm) phase was observed with increasing x according to the XRD and dielectric properties results. Ta5+ substitution for Nb5+ inhibited the grain growth and also prevented the abnormal grain growth behavior. The dielectric and ferroelectric properties of the ceramics decreased and even vanished with increasing Ta5+ substitution. Besides, the underlying mechanism for variations of the structures and properties due to Ta5+ substitution was explained in this work.
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