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铌酸盐 Ba5YTi3 Nb7 O30的结构与介电性能
引用本文:张辉,方亮,吴伯麟,袁润章.铌酸盐 Ba5YTi3 Nb7 O30的结构与介电性能[J].分析测试学报,2001,20(3):46-48.
作者姓名:张辉  方亮  吴伯麟  袁润章
作者单位:State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology,
基金项目:国家自然科学基金,国际衍射数据中心(ICDD)资助项目,50002007,98- 10,,
摘    要:在BaO-TiO2-Mb2O5体系中通过掺Y3-合成了铌酸盐Ba5YTi3Nb7O30 ,采用粉晶X射线衍射(XRD)对其结构进行了分析,并测试了其烧结体的介电特性,结果表明,在室温下Ba4YT3 Nb7O30属于填满型四方钨青铜结构,晶胞参数,a=1.24332(2)nm,c=0.39453(1)nm,α=β=γ=90度,Ba5TYi3Nb7O30在100度从铁电相转变为顺电相。

关 键 词:铌酸盐  X射线衍射  钨青铜结构  介电特性  铁电体
文章编号:1004-4957(2001)03-0046-03
修稿时间:2000年8月4日

Structure and Dielectric Properties of a Niobate Ba5YTi3Nb7O30
ZHANG Hui,FANG Liang,Wu Bo lin,Yuan Run zhang.Structure and Dielectric Properties of a Niobate Ba5YTi3Nb7O30[J].Journal of Instrumental Analysis,2001,20(3):46-48.
Authors:ZHANG Hui  FANG Liang  Wu Bo lin  Yuan Run zhang
Abstract:A niobate Ba5YTi3Nb7O30 was synthesized by doping Y3+ in the ternary system BaO-TiO2-Nb2O5. The crystal structure was determined by X -ray powder diffraction, and it belongs to tetragonal tungsten bronze structure at room temperature with unit cell parameters a=1.243 32(2) nm, c= 0.394 53(1)nm, α =β =γ =90 ° . Further, dielectric properties measurements show that Ba5YTi3Nb7O30 has the only transformation temperature, it changes from paraelectric to ferroelectric at 100 ℃ .
Keywords:Niobate  XRD  Tungsten bronze  Structure  Dielectric property
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