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Effect of Heating Rate on Microstructure and Electrical Properties of ZnO Varistors
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Wenbin CAO, Janeen SU, Jianke LIU, Jiaojiao CHEN, Yinan QIAO
Journal of the Chinese Ceramic Society | 2021, 49(12) : 2615 - 2620
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Journal of the Chinese Ceramic Society | 2021, 49(12): 2615-2620
• Research Article •
Effect of Heating Rate on Microstructure and Electrical Properties of ZnO Varistors
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Wenbin CAO, Janeen SU, Jianke LIU, Jiaojiao CHEN, Yinan QIAO
Affiliations
  • Research Center for Semiconductor Materials and Devices, Shaanxi University of Science and Technology, Xi'an 710021, China

    • CAO Wenbin (1988-), male, Associate Professor. E-mail:

About Author:

CAO Wenbin (1988-), male, Associate Professor. E-mail:

Published: 2021-12-20 doi: 10.14062/j.issn.0454-5648.20210247
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The effect of heating rate on the microstructure and electrical properties of ZnO-Bi2O3-Sb2O3-Co2O3-MnO2-Cr2O3-SiO2 varistors was investigated. ZnO grains grow rapidly with decreasing the heating rate from 3℃/min to 1.5℃/min, resulting in the deterioration of the uniformity of the sample structure. When the heating rate increases from 3℃/min to 10℃/min, the defect diffusion becomes weakly, hindering the formation of the double Schottky barrier. When the heating rate is 3℃/min, the maximum nonlinear coefficient of the sample is 43.4, the minimum leakage current is 1.0 μA/cm2, the voltage gradient is 448 V/mm, the standard deviation is the minimum, and the stability of the sample is the optimum. The loss tangent tanδ under the action of an electric field at 200 Hz-2 MHz is less than 0.03. The optimum overall electrical performance of ZnO varistor can be obtained at a heating rate of 3℃/min. Also, the existence of the negatively charged a Bi-rich phase (i.e., Bi3.73Sb0.27O6.0+x) at the grain boundary has an influence on the electrical properties of ZnO varistors.

zinc oxide  /  varistor  /  heating rate  /  stability
曹文斌, 苏锦锋, 刘建科, 陈姣姣, 乔毅楠. 升温速率对ZnO压敏陶瓷微观结构和电学性能的影响. 硅酸盐学报, 2021 , 49 (12) : 2615 -2620 . DOI: 10.14062/j.issn.0454-5648.20210247
Wenbin CAO, Janeen SU, Jianke LIU, Jiaojiao CHEN, Yinan QIAO. Effect of Heating Rate on Microstructure and Electrical Properties of ZnO Varistors[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (12) : 2615 -2620 . DOI: 10.14062/j.issn.0454-5648.20210247
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Year 2021 volume 49 Issue 12
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Article Info
doi: 10.14062/j.issn.0454-5648.20210247
  • Receive Date：2021-04-10
  • Online Date：2026-10-30
  • Published：2021-12-20
Article Data
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History
  • Received：2021-04-10
  • Revised：2021-06-10
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    Research Center for Semiconductor Materials and Devices, Shaanxi University of Science and Technology, Xi'an 710021, China
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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