为了提高ZnO压敏电阻器的性能,采用Sol-Gel法制备复合纳米添加剂｡用该复合添加剂､ZnO及SiO2混合球磨后的粉体制备了Φ10 mm×1 mm氧化锌压敏电阻器元件,并对其性能进行了测试､分析｡结果表明:Sol-Gel方法制成的元件具有粉体掺杂均匀､晶粒粒径小､分布均匀,其电性能也较传统工艺有很大提高,8/20 μs通流能力达到了2 700 A, 2 ms方波能量耐受能力超过7056 J/cm3,漏电流约为0.3 μA,非线性系数为53｡ ZnO Varistor Fabricated by Sol-Gel Method ZHANG Hui-liang, CAO Quan-xi (School of Technical Physics, Xidian University, Xi'an 710071, China) Abstract:In order to improve the performance of ZnO varistors, the powders of ZnO varistors were fabricated by blending and grinding of ZnO, SiO2 and composite nanometer additives prepared by Sol-Gel method. This powders were used to manufacture varistors with the size of 10 mm in diameter and 1 mm in thickness. The performances of ZnO varistors made from Sol-Gel method were tested and analysed. The results show that the Sol-Gel powders are uniformity in distribution of dopants and the grains are small in size and regular in microstructure. Compared to the conventional technique, the varistors made form Sol-Gel method show great improvement in the electrical properties. The 8/20 μs surge absorption capability of the ZnO varistors attains to 2 700 A and the withstanding rectangular current pulse(2 ms) capability of the ZnO varistors preponderates over 7056 J/cm3. The leakage current is approximately 0.3 μA and the nonlinearity is 53. Key words:Sol-Gel method; ZnO varistors;composite nanometer additives;surge absorption capability