硅酸盐学报

Na-Zr替代对Bi_2(Zn_(1/3)Nb_(2/3))_2O_7陶瓷性能的影响

作者：李在映丁士华宋天秀

单位：西华大学材料科学与工程学院

分类号：TQ174.12

出版年,卷(期):页码：2010,38(3):393-396

DOI：

摘要：

研究Na+替代Bi3+、Zr4+替代Nb5+对铋锌铌基陶瓷烧结特性、显微结构和介电性能的影响。结果表明:替代后样品的烧结温度从1000℃降低到880℃;在-30～+130℃,样品温谱出现明显的介电弛豫现象;弛豫峰值温度随Zr4+替代量增加向高温方向移动,弛豫过程的激活能在0.3eV左右。用缺陷偶极子和晶格畸变对Na-Zr掺杂Bi2(Zn1/3Nb2/3)2O7的介电弛豫现象作出解释。

Effects of substitution Na + for Bi 3+ and Zr 4+ for Nb 5+ on sintering properties and microstructure and dielectric properties of Bi2(Zn1/3Nb2/3) 2O7 based ceramics were investigated.The results reveal that the sintering temperature of the substituted samples de-creases to 880 ℃from 1000℃,At-30-+130℃,the dielectric relaxation peak is obviously observed as a function of temperature. The permittivity maximum temperature shifts to higher when the Zr 4+ content increases.Defect dipole and distortion of crystal lattices are proposed for explanation of dielectric relaxation of Na-Zr doped Bi2(Zn1/3Nb2/3) 2O7 ceramics.

基金项目：

材料学重点学科及校人才基金(R0620109)资助项目

作者简介：

参考文献：

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