弥散铁电陶瓷的峰值介电常数对频率的依赖关系研究  

The Dependence of the Maximum of Dielectric Constant on Frequency for Diffuse Ferroelectrics

作　　者：朱卫利[1] 喻惠武[1] 李立本[1] 王晓飞[1] 陈庆东[1] 王会娴[1] 

机构地区：[1]河南科技大学物理与工程学院,河南洛阳471003

出　　处：《河南大学学报（自然科学版）》2012年第1期17-19,23,共4页Journal of Henan University:Natural Science

基　　金：国家自然科学基金资助项目(50972056);河南科技大学科研创新能力培育基金项目(2010CZ20017)

摘　　要：采用传统固相合成法制备了锆掺杂的钛酸钡陶瓷Ba(Zr0.15Ti0.85)O3(BZT),并对其介电性能进行了研究.发现1 280℃烧结的BZT陶瓷的介电性能呈现明显的弥散性相变和弛豫特点.用Smolenski成分起伏理论结合德拜弛豫理论计算了BZT的介电常数峰值εrm与频率的关系,与实验结果吻合较好.Barium zirconium titanate Ba（Zr0.15Ti0.85）O3（BZT） ceramic was prepared via the traditional solid state reaction and its dielectric properties were studied.The BZT ceramic sintered at 1 280 ℃obviously showed dielectric characteristics with diffuse phase transition and relaxation.The frequency dependence of maximum of dielectric constant had been obtained by integrating Smolenski theory with the Debye relaxation theory.The theoretical results agreed well with the experimental data.

关 键 词：固相法 BZT陶瓷 相变弥散 介电弛豫 

分 类 号：O484[理学—固体物理]