【摘要】 本文采用化学共沉淀法制备了颗粒细、活性好的ZnO压敏电阻粉体，表征了粉体的性能．利用共沉淀粉体制备了α＝50、压敏电压高、通流能力大的压敏电阻．与传统氧化物机械混合粉体制得的压敏电阻比较，共沉淀粉体获得的压敏电阻微观结构均匀．更多还原

【Abstract】 Fine and active ZnO varistor powders were prepared by coprecipitation. Properties of the powders were demonstrated. Nonlinearity coefficients 50, high breakdown fields and large surge capability were achieved in varistor produced by these powders. The microstructure of varistors prepared by coprecipitation powders is uniformer than that of varistors prepared by conventionally prepared powders by mixed oxide technique.更多还原