应用新型溶胶-凝胶法制备了ZnO陶瓷薄膜,研究了退火温度对ZnO陶瓷薄膜低压压敏电阻电性能的影响.结果表明,采用溶胶掺杂在550℃退火条件下可形成Zn7Sb2O12及ZnCr2O4相,且在退火温度范围内(550～950℃)基本上没有焦绿石相形成.当退火温度达到750℃以后,Sb2O3已全部转变为稳定性好的尖晶石相,同时存在Bi2O3、ZnO的挥发.采用适当的退火温度,可得到具有优良电性能的ZnO陶瓷薄膜低压压敏电阻,其压敏电压低于5 V,非线性系数可达20,漏电流密度小于0.5μA/mm2.
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