摘要
研究了钽对二氧化钛压敏电阻性能的影响。研究中发现掺入 0 .2 5mol %Ta2 O5的样品显示出最低的反转电压 (Eb= 6V/mm)、最高的非线性常数 (α =8.8)以及最高的相对介电常数 (εr=6 .2× 10 4 ) ,与样品电容和电阻的频谱特性相一致。样品的性能变化可用Ta5+ 对Ti4 +
The electrical properties of TiO2 based ceramics with various Ta2O5 dopants were investigated. It was found that an optimal doping composition of 99.75% TiO2·0.25% Ta2O5 with low breakdown voltage of 6 V/mm, high nonlinear constant of 8.8 and ultrahigh electrical permittivity of 6.2×104 (measured at 1 kHz), which is consistent with the frequency hygrometer of the capacitance and the resistivity. The characteristics of the ceramics can be explained by the effect and the maximum of the substitution of Ta5+ for Ti4+.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2001年第6期622-624,共3页
Journal of Functional Materials
关键词
压敏材料
二氧化钛
电学性能
频谱
钽
掺杂
Capacitance
Ceramic materials
Electric breakdown
Electric properties
Permittivity
Tantalum compounds
