摘要
采用固相反应制备了(Bi1.975Li0.025)(Zn2/3Nb4/3-xSnx)O7陶瓷,研究了Sn4+取代Nb5+对BLZNS陶瓷介电性能的影响。结果表明,当替代量x≤0.4时,相结构保持单一的单斜焦绿石相。介电损耗温度特性出现了明显的弛豫现象,运用缺陷偶极子模型分析了该现象。x为0.05、0.15、0.30和0.40时,样品的介电损耗峰值温度为78℃、7℃、36℃、83℃,比较了介电弛豫温区移动的差异及分析介电弛豫现象的不对称。
（Bi1.975Li0.025）（Zn2/3Nb4/3-xSnx）O7 ceramics were prepared by the solid phase reaction method.The effects of Sn4＋ substitution for Nb5＋ on the dielectric properties of BLZNS ceramics were investigated.The results reveal that the ceramics have single monoclinic pyrochlore phase when the substitutive contents of x≤0.4.The relaxation behavior was observed clearly in the relationship of dielectric loss and temperature.The relaxation characteristic was analhyzed by the model of defect dipolar.When x increases from 0.05 to 0.15 and 0.30 then 0.40,the dielectric loss peak temperature of samples are 78 ℃,7 ℃,36 ℃ to 83 ℃,respectively.The difference of the shift in the tepmerature range of the dielectric relaxation and the asymmetry of dielectric relaxation were analyzed.
出处
《压电与声光》
CSCD
北大核心
2010年第3期467-470,共4页
Piezoelectrics & Acoustooptics
基金
四川省教育厅科技基金资助项目(2006C025)
校人才基金资助项目(R0620109)
