摘要
研究了烧结温度对WO3系电容-压敏复合陶瓷显微结构、非线性电学性能及介电性能的影响。随着烧结温度从1050℃到1200℃的升高,WO3陶瓷的晶粒尺寸增大,压敏电压随之降低。在1150℃烧结条件下,掺杂0.8mol%Y2O3的WO3压敏陶瓷样品表现出优良的综合电性能,其非线性系数为3.5,相对介电常数为1.13×104。然而,过高的烧结温度,不利于样品的非线性电学性能。WO3系电容-压敏复合陶瓷较适合的烧结温度为1150℃,这是因为,在此温度下最有利于样品的晶界势垒结构的形成。
The effect of sintering temperature on the microstructure, nonlinear electrical behavior, and dielectric properties of the Y2O3-doped WO3 ceramics was studied. The decrease in breakdown voltage directly relates to the grain growth of WO3 grains when increasing the sintering temperatures from 1050 to 1200 ℃. The capacitor-varistor of WO3- 0.8 mol% Y2O3 composite sintered at 1150 ℃ exhibits the maximal nonlinear coefficient of 3.5 and the highest dielectric constant of 1.13 × 10^4. However, higher sintering temperature than 1150 ℃ is not favorable for the nonlinear electrical behavior of the WO3 ceramics. The best nonlinear properties of the samples sintered at 1150 ℃ can be explained by the most efficient boundary barrier layer with can be formed sintered at the proper temperature.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2009年第A02期329-332,共4页
Rare Metal Materials and Engineering
基金
National Science Development Foundation of China (No.2008-80)
