水热合成钛酸锶粉体增强压敏电阻器电性能的研究  

Study for electrical properties enhancement of SrTiO_3 varistors by a hydrothermal synthesis route

作　　者：李维强[1] 王昕[1] 尹衍升[2] 尧巍华 李文戈[2] 刘伯洋[2] 范艳华[2] 

机构地区：[1]中国海洋大学材料科学与工程研究院,青岛266100 [2]上海海事大学,上海200135 [3]上海易力禾电子有限公司,上海201619

出　　处：《现代技术陶瓷》2012年第2期3-6,共4页Advanced Ceramics

基　　金：国家科技部科技特派员计划(项目号2009GJC00003);国家自然科学基金项目(51172217);山东省自然科学基金项目(ZR2009FZ003);青岛市科技计划基础研究项目(10-3-4-1-jch;09-1-3-39-jch)

摘　　要：以硝酸锶Sr(NO3)2为锶源、酞酸四丁酯Ti(OC4H9)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ɑ分别达到120V和8。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.

关 键 词：水热法 SRTIO3压敏电阻器 电性能优异 

分 类 号：TQ424.25[化学工程]