热分解氧化反应对TiO_2电容压敏电阻器性能的影响

Effect of Thermal Decomposition Accompanying With Oxidation on Tio_2 Capacitor-varistor Ceramics

研究了具有热分解氧化反应的ＣｕＯ、ＭｎＯ２等的一类氧化物对ＴｉＯ２压敏电阻器性能的影响，采用Ｃ—Ｖ分析、Ｉ—Ｖ测量和介电测量等实验手段，分析了它们的作用机理．结果发现，在晶界处发生的热分解氧化反应能增加界面态密度，提高晶界势垒高度，从而改善ＴｉＯ２电容压敏电阻器的非线性性能．

The influence of oxide such as CuO and MnO_2 which have the character of decomposition accompanying with oxidation on the TiO2 capacitor-varistor ceramics was studied. Based onthe results of C - V analysis, I - V analysis and dielectric measurements, their working mechanismwas analyzed. The results show that the decomposition accompanying with oxidation is useful forincreasing the surface state density and the height of grain-boundary barrier, and therefore improves the nonlinear property of TiO_2 capacitor-varistor ceramics.