Dielectric and Piezoelectric Properties of SrBi2−xSmxNb2O9 (x=0, 0.05, 0.1, 0.2, 0.3, and 0.4) Ceramics
Dielectric and Piezoelectric Properties of SrBi2−xSmxNb2O9 (x=0, 0.05, 0.1, 0.2, 0.3, and 0.4) Ceramics
复制标题
SrBi2−xSmxNb2O9 (x=0、0.05、0.1、0.2、0.3 和 0.4) 陶瓷的介电和压电性能
DOI：
--
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Shi
中科院分区：
文献类型：
--
作者：
Lin Sun;Chude Feng;Lidong Chen;Shi
研究了SrBi2−xSmxNb2O9（x= 0，0.05，0.1，0.2，0.3，0.4）陶瓷的介电和压电性能。采用固相反应烧结法制备了SrBi 2 −xSmxNb2O9陶瓷。X射线衍射测量表明，获得的所有组合物的单相层状钙钛矿。Sm3+取代Bi2O2层中的Bi3+导致SrBi2−xSmxNb2O9的频率色散的弛豫行为。SrBi 2 − xSmxNb 2 O 9的拉曼光谱表明，Tm的降低可以归因于由Sm 3+取代Bi 3+引起的NbO 6八面体的较小结构畸变。SrBi2−xSmxNb2O9（x≤0.2）陶瓷适用于精密公差谐振器应用，因为在Bi2O2层中掺杂Sm3+可以提高谐振频率的温度系数。
The dielectric and piezoelectric properties of SrBi2−xSmxNb2O9 (x=0, 0.05, 0.1, 0.2, 0.3, and 0.4) ceramics were investigated. SrBi2−xSmxNb2O9 ceramics were synthesized by the conventional solid-state reaction sintering method. An X-ray diffraction measurement indicated that a single-phase-layered perovskite was obtained for all compositions. The substitution of Sm3+ for Bi3+ in the Bi2O2 layers induced a relaxor behavior of frequency dispersion for SrBi2−xSmxNb2O9. The Raman spectra of SrBi2−xSmxNb2O9 revealed that the decrease in Tm could be attributed to smaller structural distortion of NbO6 octahedra that is induced by the substitution of Sm3+ for Bi3+. SrBi2−xSmxNb2O9 (x≤0.2) ceramics are suitable for fine tolerance resonator applications because the Sm3+ doping in Bi2O2 layers can improve the temperature coefficient of resonance frequency.