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.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2010年第3期393-396,共4页
Journal of The Chinese Ceramic Society
基金
材料学重点学科及校人才基金(R0620109)资助项目
关键词
铋锌铌基陶瓷
烧结温度
介电弛豫
离子替代
缺陷偶极子、晶格畸变
bismuth zinc niobate based ceramic
sintering temperature
dielectric relaxation
ion substitution
defect dipole
distortion of crystal lattic
