標題: Analysis of the dielectric characteristics for polycrystalline Ba(0.65)Sr(0.35)TiO(3) (I)-frequency dependence in the paraelectric state
作者: Liou, JW
Chiou, BS
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 1-十一月-2000
摘要: The frequency and d.c. field dependences of dielectric properties of Ba(0.65)Sr(0.35)TiO(3) (BST) with various grain sizes (0.87 mum to 5.43 mum) have been studied in the paraelectric state. The frequency response is analyzed by two approximated power laws obtained on the basis of the Cole-Cole expression. The distribution of relaxation times in BST is broader for specimens with finer grains. The d.c. field is found to affect the static permittivity epsilon (0) rather than the distribution of relaxation times. The effect of the d.c. field on the dielectric permittivity is suppressed for samples with smaller grains and transition broadening is presumed to cause this suppression. It is concluded that both the temperature dependence and the frequency response of the dielectric characteristics of Ba(0.65)Sr(0.35)TiO(3) are suppressed by the transition broadening. (C) 2000 Kluwer Academic Publishers.
URI: http://dx.doi.org/10.1023/A:1008945200078
http://hdl.handle.net/11536/30178
ISSN: 0957-4522
DOI: 10.1023/A:1008945200078
期刊: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume: 11
Issue: 8
起始頁: 637
結束頁: 643
顯示於類別:期刊論文