摘要
伏安特性测量和分析表明,随热处理温度增高,空气中氧扩散热处理SrTiO3压敏电阻的界面电子势垒高度和压敏电压不断增大,而非线性系数则开始增大随后反而减小。分析认为,这与扩散层的厚度不断增加有关。复阻抗测量得到晶粒电阻Rg随热处理温度增高而增大的实验事实,为扩散层的存在及其变化提供了间接证明。
Measured and analyzed were the volt-ampere characteristics of SrTiO3 varistor based on oxygen-diffusion heat treatment. Obtained results show that both height of interface barrier and varistor voltage will increase continuously, but nonlinear coefficient increase firstly and then decrease with the increase of heat treatment temperature. The thickness of diffusion-layer will increase continuously while the increase of heat treatment temperature. The presence and change of the diffussion-layer are supported by the experimental fact of a complex impedance plots,i.e. the resistance of grain increase with the increase of heat treatment temperature.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2004年第9期11-13,16,共4页
Electronic Components And Materials
基金
广州市科技计划资助项目(2002JI-C0191)
关键词
SRTIO3压敏电阻
非线性
界面势垒
氧扩散热处理
electronic technology
SrTiO_3 varistor
nonlinearity
oxygen-diffusion heat treatment
interface barrier
diffusion-layer
