复合纳米添加法制备ZnO压敏电阻器

提出了一种利用复合纳米添加剂改善ZnO压敏电阻的晶界效应和微观特性，以获得高性能ZnO电阻片的方案，并通过化学共沉淀法制备了多元复合纳米添加剂。实验分析表明，此方案能提高通流50％以上，并能显著改善器件的微观均一性，制得的复合添加剂选择性好，易于实现工业化生产。

ZnO Varistor Manufactured by Composite Nano-additives

A new method for manufacturing ZnO varistors is proposed. The procedure is based on the analysis of the effects of ZnO grain boundaries and mainly emphases on improving the microstructural uniformity so as to obtain the high quality components. As a result of the experiment, fine and active multiplex composite nano-additives are prepared by chemical coprecipitation, and large surge absorption capability increases by more than 50%. Also much uniformer microstructure compared to conventional mixed oxide technique is achieved. The novelty of the method is that the shape of the obtained powders is apt to control, and this new technique of manufacturing ZnO varistors is more feasible in spawning various ceramic components via the existing equipments.