Calculation model by Voronoi network and verification of zinc oxide varistor considering conduction mechanism
Abstract This paper investigates the impact of the microstructure of zinc oxide varistor ceramics on their electrical properties. The microstructure of varistor was characterized by Voronoi network, and the relationship between microstructure and electrical properties was studied by experiments. The...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-03-01
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| Series: | International Journal of Ceramic Engineering & Science |
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| Online Access: | https://doi.org/10.1002/ces2.70001 |
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| _version_ | 1850063298204008448 |
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| author | Xiao Lei Xin Ning Peng Liu Pengfei Meng Yue Yin Jingke Guo |
| author_facet | Xiao Lei Xin Ning Peng Liu Pengfei Meng Yue Yin Jingke Guo |
| author_sort | Xiao Lei |
| collection | DOAJ |
| description | Abstract This paper investigates the impact of the microstructure of zinc oxide varistor ceramics on their electrical properties. The microstructure of varistor was characterized by Voronoi network, and the relationship between microstructure and electrical properties was studied by experiments. The results of the calculations indicate that the reduction of grain size leads to a linear increase in voltage gradient but also reduces the energy handling capacity and current‐carrying capacity. An increase in grain nonuniformity causes a decrease in voltage gradient and leakage current, while the nonlinear coefficient and residual voltage ratio increase. The variation of grain resistivity significantly affects the residual voltage ratio, and the two are almost proportional. When the grain resistivity reaches 50 Ω·m, the residual voltage ratio is as high as 2.37. The influence of grain resistivity on flow capacity has an obvious inflection point and reaches the maximum value at about 1 Ω·m, about 5000 A. The increase in sample diameter size leads to a decrease in the varistor voltage gradient and nonlinear coefficient. The results can better characterize the effect of the changes of the structure of the varistor on the electrical properties. |
| format | Article |
| id | doaj-art-e674c63267b6487b8dbe139cd1121028 |
| institution | DOAJ |
| issn | 2578-3270 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Ceramic Engineering & Science |
| spelling | doaj-art-e674c63267b6487b8dbe139cd11210282025-08-20T02:49:40ZengWileyInternational Journal of Ceramic Engineering & Science2578-32702025-03-0172n/an/a10.1002/ces2.70001Calculation model by Voronoi network and verification of zinc oxide varistor considering conduction mechanismXiao Lei0Xin Ning1Peng Liu2Pengfei Meng3Yue Yin4Jingke Guo5State Grid Sichuan Electric Power Co., Ltd. Electric Power Research Institute Chengdu ChinaState Grid Sichuan Electric Power Co., Ltd. Electric Power Research Institute Chengdu ChinaState Grid Sichuan Electric Power Co., Ltd. Electric Power Research Institute Chengdu ChinaCollege of Electrical Engineering Sichuan University Chengdu ChinaCollege of Electrical Engineering Sichuan University Chengdu ChinaCollege of Electrical Engineering Sichuan University Chengdu ChinaAbstract This paper investigates the impact of the microstructure of zinc oxide varistor ceramics on their electrical properties. The microstructure of varistor was characterized by Voronoi network, and the relationship between microstructure and electrical properties was studied by experiments. The results of the calculations indicate that the reduction of grain size leads to a linear increase in voltage gradient but also reduces the energy handling capacity and current‐carrying capacity. An increase in grain nonuniformity causes a decrease in voltage gradient and leakage current, while the nonlinear coefficient and residual voltage ratio increase. The variation of grain resistivity significantly affects the residual voltage ratio, and the two are almost proportional. When the grain resistivity reaches 50 Ω·m, the residual voltage ratio is as high as 2.37. The influence of grain resistivity on flow capacity has an obvious inflection point and reaches the maximum value at about 1 Ω·m, about 5000 A. The increase in sample diameter size leads to a decrease in the varistor voltage gradient and nonlinear coefficient. The results can better characterize the effect of the changes of the structure of the varistor on the electrical properties.https://doi.org/10.1002/ces2.70001electrical propertiesmicrostructureVoronoi networkzinc oxide varistor |
| spellingShingle | Xiao Lei Xin Ning Peng Liu Pengfei Meng Yue Yin Jingke Guo Calculation model by Voronoi network and verification of zinc oxide varistor considering conduction mechanism International Journal of Ceramic Engineering & Science electrical properties microstructure Voronoi network zinc oxide varistor |
| title | Calculation model by Voronoi network and verification of zinc oxide varistor considering conduction mechanism |
| title_full | Calculation model by Voronoi network and verification of zinc oxide varistor considering conduction mechanism |
| title_fullStr | Calculation model by Voronoi network and verification of zinc oxide varistor considering conduction mechanism |
| title_full_unstemmed | Calculation model by Voronoi network and verification of zinc oxide varistor considering conduction mechanism |
| title_short | Calculation model by Voronoi network and verification of zinc oxide varistor considering conduction mechanism |
| title_sort | calculation model by voronoi network and verification of zinc oxide varistor considering conduction mechanism |
| topic | electrical properties microstructure Voronoi network zinc oxide varistor |
| url | https://doi.org/10.1002/ces2.70001 |
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