High-temperature Dielectric Relaxation and Impedance Analysis of BaTi1-xSnxO3Ceramics

Huang Guang; Liu Qiu-xiang

doi:10.12052/gdutxb.170001

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High-temperature Dielectric Relaxation and Impedance Analysis of BaTi_1-xSn_xO₃Ceramics

更新时间：2026-05-27

- High-temperature Dielectric Relaxation and Impedance Analysis of BaTi_1-xSn_xO₃Ceramics
- Vol. 34, Issue 6, Pages: 88-92(2017)
- 作者机构：
  
  广东工业大学　物理与光电工程学院,广东,广州,510006
- 作者简介：
- 基金信息：
- DOI：10.12052/gdutxb.170001
  CLC： O469
- Online First：09 November 2017，
  
  Published：2017
- 稿件说明：
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黄广, 刘秋香. Ba(Ti_l-xSn_x)O₃陶瓷的高温介电弛豫现象与阻抗研究[J]. 广东工业大学学报, 2017, 34(6): 88-92. DOI: 10.12052/gdutxb.170001.

Huang Guang, Liu Qiu-xiang. High-temperature Dielectric Relaxation and Impedance Analysis of BaTi_1-xSn_xO₃Ceramics[J]. 2017, 34(6): 88-92. DOI: 10.12052/gdutxb.170001.
黄广, 刘秋香. Ba(Ti_l-xSn_x)O₃陶瓷的高温介电弛豫现象与阻抗研究[J]. 广东工业大学学报, 2017, 34(6): 88-92. DOI: 10.12052/gdutxb.170001. DOI：

Huang Guang, Liu Qiu-xiang. High-temperature Dielectric Relaxation and Impedance Analysis of BaTi_1-xSn_xO₃Ceramics[J]. 2017, 34(6): 88-92. DOI: 10.12052/gdutxb.170001. DOI：

摘要

通过传统的高温固相法制备了BaTi

(

=0.02

0.10

0.15

0.25)陶瓷. XRD图显示

制备的所有样品的相都是单一的纯钙钛矿相. 随着Sn

/Ti

的摩尔比的增大

样品的居里温度向低温方向移动. 当

=0.02

0.10以及0.15时

阻抗谱显示主要是晶界对样品电阻的贡献. 而当

=0.25时

则晶粒和晶界两者的贡献均不可忽略. 介电谱和阻抗谱分析显示

介电计算出来的活化能比阻抗计算出来的活化能要低

表明高温弛豫的机理应该以偶极子传导为主

可以用氧空位的热动力学过程来解释.

Abstract

BaTi

(

=0.02

0.10

0.15

0.25) ceramics were synthesized by the traditional solid state reaction method. XRD spectrum shows that all sample is tetragonal phase. With the increase of Sn

/Ti

molar ratio

Curie temperature of all compositions will drop a little. When

value range 0.02 to 0.15

the impedance spectrum analysis shows that the sample resistance may be mainly ascri

bed to grain boundary. While for composition of

=0.25

the response from grain can not be ignored. Through analyzing the dielectric spectrum and impedance spectroscopy

the values of activation energy calculated from conduction were lower than that calculated from impedance measurements. The results suggest that the relaxation process of BaTi

ceramics is dominated by a dipolar conduction. The conduction mechanism can be explained by thermal dynamic process of oxygen vacancy.

关键词

Keywords

references

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