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发明公开
CN110078494A 一种氧化锌电阻片及其制备方法 有权

一种氧化锌电阻片及其制备方法
摘要：
本发明提供了一种氧化锌电阻片，所述电阻片含按质量百分比计的：ZnO：85～95％，Bi2O3：0.5～5.0％，Co3O4：0.05～0.5％，NiO：0.5～2.0％，MnO：0.1～2.0％，Sb2O3：2.0～8.0％，SiO2：0.01～1.0％，Er2O3：0.01～1.0％，Ag2O：0.1～2.0％。本发明提供的电阻片的直径≥115mm，压敏电压梯度达到450V/mm以上，残压比≤1.58，2ms方波耐受电流≥2000A，4/10μs大电流冲击耐受电流100kA，老化系数≤1.1，经峰值为3000A的8/20μs脉冲电流冲击后压敏电压变化率小于6％。本发明提供的技术方案，制备工艺简单，技术经济性高，现有的避雷器用氧化锌压敏电阻片制造设备完全可以实现工业生产需求。
摘要（英）：

The invention provides a ZnO resistor disc. The resistor disc is prepared from, in percentage by mass, 85%-95% of ZnO, 0.5%-5% of Bi2O3, 0.05%-0.5% of Co3O4, 0.5%-2.0% of NiO, 0.1%-2.0% of MnO, 2.0%-8.0% of Sb2O3, 0.01%-1.0% of SiO2, 0.01%-1.0% of Er2O3 and 0.1%-2.0% of Ag2O. The provided resistor disc has the diameter larger than or equal to 115 mm, the varistor voltage gradient reaches 450 V/mmor above, the residual voltage ratio is smaller than or equal to 1.58, 2ms square wave withstanding current is larger than or equal to 2,000 A, 4/10 mu s large-current impact withstanding current is 100 kA, the ageing coefficient is smaller than or equal to 1.1, and the varistor voltage change rate is smaller than 6% after impact of 8/20 mu s impulse current with the peak value of 3,000 A. According to the technical scheme, the preparation process is simple, the technology economy is high, and existing manufacturing equipment of ZnO resistor discs for lightening arrestors can completely meet the industrial production demands.

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