【摘 要】
：
The microstructure and electrical properties of ZnO varistor ceramics with different ZrO2 content prepared by a solid reaction route and sintered at 1100℃ were investigated.The microstructures of the
【出 处】
：
2012 Postdoctoral Symposium of China on Materials Science &
论文部分内容阅读
The microstructure and electrical properties of ZnO varistor ceramics with different ZrO2 content prepared by a solid reaction route and sintered at 1100℃ were investigated.The microstructures of the varistor ceramics samples were characterized by X-ray diffractometry (XRD) and scanning electron microscopy (SEM), at the same time, the electrical properties and current-voltage (Ⅴ-Ⅰ) characteristics of the varistor ceramics samples were investigated by a DC parameter instrument for varistors.The microstructure of the prepared samples showed a decrease in grain size of ZnO phase with the ZrO2 content increasing.ZrO2-doped ZnO varistor ceramics exhibit comparatively vastly superior comprehensive electrical properties with addition of 0.50 mol% ZrO2, such as the threshold voltage was 350 V / mm, the nonlinear coefficient was 25.4 and the leakage current was 2.96 μA.
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