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退火温度对zno陶瓷薄膜低压压敏特性的影响

Keywords: 无机非金属材料,新型溶胶-凝胶法,退火温度

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Abstract:

?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zn$_{7}$sb$_{2}$o$_{12}$及zncr$_{2}$o$_{4}$相,且在退火温度范围内(550$\sim$950℃)基本上没有焦绿石相形成.当退火温度达到750℃以后,sb$_{2}$o$_{3}$已全部转变为稳定性好的尖晶石相,同时存在bi$_{2}$o$_{3}$、zno的挥发.采用适当的退火温度,可得到具有优良电性能的zno陶瓷薄膜低压压敏电阻,其压敏电压低于5v,非线性系数可达20,漏电流密度小于0.5$\mu$a/mm$^{2}$.

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