Dielectric response and tunability of a dielectric-paraelectric composite
Dielectric response and tunability of a dielectric-paraelectric composite
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DOI：
10.1063/1.2982086
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发表时间：
2008-09-08
影响因子：
4
通讯作者：
Alpay, S. P.
中科院分区：
文献类型：
--
作者：
Zhou, K.;Boggs, S. A.;Alpay, S. P.
进行了理论研究，以确定的线性，低损耗的电介质矩阵均匀尺寸的，随机分布的顺电Ba0.60Sr0.40TiO 3（BST 60/40）颗粒的体积分数和颗粒尺寸的函数组成的复合材料的介电响应和可调谐性。通过非线性热力学模型指定夹杂物的极化和介电响应的场依赖性，然后将其纳入二维有限元分析中。在BST颗粒的逾渗阈值附近（取决于颗粒尺寸，类似于27%至45%），可以实现具有比单片BST更低的有效介电常数的高介电可调谐性。(C)2008年美国物理学会。美国物理学会.
A theoretical study was carried out to determine the dielectric response and tunability of a composite consisting of a linear, low-loss dielectric matrix with uniformly sized, randomly distributed paraelectric Ba0.60Sr0.40TiO3 (BST 60/40) particles as functions of the volume fraction and size of the particles. The field dependence of the polarization and the dielectric response of the inclusions are specified through a nonlinear thermodynamic model and then incorporated into a two-dimensional finite element analysis. Near the percolation threshold for BST particles (similar to 27% to 45% depending on the particle size), high dielectric tunabilities with a lower effective permittivity than monolithic BST can be realized. (C) 2008 American Institute of Physics. American Institute of Physics.