Two-step sintering of ZnO varistors
作者： Mohammad Maleki Shahraki , Seyyed Ali Shojaee , Mohammad Ali Faghihi Sani , Ali Nemati , Iman Safaee
DOI: 10.1016/J.SSI.2010.06.026
关键词:
摘要: In this research, effects of two-step sintering parameters, such as first and second step sintering temperatures (T1 and T2, respectively) and soaking time in the second step, on microstructure and electrical properties of ZnO varistors have been studied. In addition, slow rate of grain growth in the second step of sintering has also been investigated. Near fully dense (higher than 99%) and sub-micron grain size (1–0.75 μm) ZnO varistors have been fabricated by different two-step sintering cycles. Decreasing T1 and T2 result in longer …
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