Nickel oxide doping effects on electrical characteristics and microstructural phases of ZnO varistors with low residual voltage ratio
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概要
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The effects of nickel oxide (Ni2O3) additives on electrical characteristics and microstructural phases of ZnO varistors with low residual voltage ratio are studied. The breakdown electrical fields increase remarkably with the amount of the doped nickel oxide increased. The minimum of the residual voltage ratios of the samples reaches 1.39. While the amount of the doped nickel oxide is more than 2 mol %, a new phase of chrombismite Bi16CrO27 is observed from X-ray diffraction (XRD) and scanning electron microscopy (SEM). The δ-Bi2O3 phase decreases and the BiO2−x phase increases correspondingly. In addition, the capacitance versus voltage (C–V) characteristics of the samples are measured and analyzed.
著者
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LIU Jun
State Key Lab. of Integrated Service Networks, Xidian University
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He Jinliang
State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University
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Long Wangcheng
State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University
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Hu Jun
State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University
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Liu Jun
State Key Lab. Of Integrated Service Networks Xidian University:(present Office)xi'an Satellite
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LIU Jun
State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University
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