水热合成钛酸锶粉体增强压敏电阻器电性能的研究

摘要

The SrTiO3 powders were by a hydrothermal method, through the reaction of Sr（ NO3 ）2 with Ti（OC4H9）4 in water, using NaOH/KOH as mineralizer, while the temperature was increased to 130 C and maintained for 24h under autogenous pressure. The samples were investigated by XRD, SEM, electrical property examination. The results show that varistors prepared from hydrothermal SrTiO3 powders exhibited a high VimA of 120V and absolutely improved ct of 8, which are both visibly enhanced compared with varistors pre- pared by traditional solid -state route in the same formula.%以硝酸锶Sr（NO3）2为锶源、酞酸四丁酯Ti（0C4H9）4为钛源，加入矿化剂NaOH／KOH，在130℃下反应24h水热合成了SrTiO3粉体。将水热粉体应用到压敏电阻器中，分别采用XRD、电性能测试、SEM等手段对产物进行表征。电性能测试结果显示，与传统固相法制备的SrTiO3压敏电阻器相比，同配方下此类压敏电阻器电性能获得显著提高，压敏电压V1mA和非线性系数α分别达到120V和8。