采用固相反应法,制备了一系列（1-x）CaCu3Ti4O12-xAl2O3（x=0,0.15,0.30,0.40）复相陶瓷.结果表明：Al2O3掺杂使CaCu3Ti4O12基陶瓷在降低低频范围内的介电损耗之外,同时使压敏电压大幅度的提高.当Al2O3的含量为0.30时的样品具有良好的综合电学性能：rε=2 000,tanδ=0.04（1 kHz）,压敏电压Eb=1 084 V/mm且非线性系数α=4.6.%The CaCu3Ti4O12 ceramics doped with various Al2O3（0,0.15,0.30 and 0.40） contents were fabricated by a solid-state reaction method.The results showed that, Al2O3 additive has not only reduced the dielectric loss of low frequency range but also significantly raised the breakdown voltage.When Al2O3 doping concentration x was 0.30,the specimen has achieved the best comprehensive electrical properties,including a dielectric constant（εr） of 2 000,dielectric loss（tan δ） of 0.04,breakdown voltage （Eb） of 1 084 V/mm,and a nonlinear coefficient of 4.6.
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