Power loss transition of stable ZnO varistor ceramics: Role of oxygen adsorption on the stability of interface states at the grain boundary
Highly stable ZnO varistor ceramics with steadily decreasing power loss have been put into applications in electrical and electronic systems for overvoltage protections, even with the absence of general understandings on their aging behaviors. In this paper, we investigated their aging nature via co...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2023-05-01
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| Series: | Journal of Advanced Ceramics |
| Subjects: | |
| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2023.9220732 |
| _version_ | 1797801061072764928 |
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| author | Zhuolin Cheng Rou Li Yiwei Long Jianying Li Shengtao Li Kangning Wu |
| author_facet | Zhuolin Cheng Rou Li Yiwei Long Jianying Li Shengtao Li Kangning Wu |
| author_sort | Zhuolin Cheng |
| collection | DOAJ |
| description | Highly stable ZnO varistor ceramics with steadily decreasing power loss have been put into applications in electrical and electronic systems for overvoltage protections, even with the absence of general understandings on their aging behaviors. In this paper, we investigated their aging nature via conducting comparative direct current (DC) aging experiments both in air and in nitrogen, during which variations of electrical properties and interface properties were measured and analyzed. Notably, continuously increasing power loss with severe electrical degradation was observed for the sample aged in nitrogen. The power loss transition was discovered to be closely related to the consumption of oxygen adsorption at the grain boundary (GB), which could, however, remain constant for the sample aged in air. The interface density of states (DOS) Ni, which is crucial for pinning the potential barrier, was proved to decrease in nitrogen, but keep stable in air. Therefore, it is concluded that the oxygen adsorption at the GB is significant for the stability of interface states, which further correlates to the long-term stability of modern stable ZnO varistor ceramics. |
| first_indexed | 2024-03-13T04:44:41Z |
| format | Article |
| id | doaj.art-a316594780e1441c9f5eebcbf4a30053 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-13T04:44:41Z |
| publishDate | 2023-05-01 |
| publisher | Tsinghua University Press |
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| series | Journal of Advanced Ceramics |
| spelling | doaj.art-a316594780e1441c9f5eebcbf4a300532023-06-19T03:59:28ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082023-05-0112597298310.26599/JAC.2023.9220732Power loss transition of stable ZnO varistor ceramics: Role of oxygen adsorption on the stability of interface states at the grain boundaryZhuolin Cheng0Rou Li1Yiwei Long2Jianying Li3Shengtao Li4Kangning Wu5State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaDepartment of Thermal and Fluid Engineering, University of Twente, Enschede 7500AE, the NetherlandsState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaHighly stable ZnO varistor ceramics with steadily decreasing power loss have been put into applications in electrical and electronic systems for overvoltage protections, even with the absence of general understandings on their aging behaviors. In this paper, we investigated their aging nature via conducting comparative direct current (DC) aging experiments both in air and in nitrogen, during which variations of electrical properties and interface properties were measured and analyzed. Notably, continuously increasing power loss with severe electrical degradation was observed for the sample aged in nitrogen. The power loss transition was discovered to be closely related to the consumption of oxygen adsorption at the grain boundary (GB), which could, however, remain constant for the sample aged in air. The interface density of states (DOS) Ni, which is crucial for pinning the potential barrier, was proved to decrease in nitrogen, but keep stable in air. Therefore, it is concluded that the oxygen adsorption at the GB is significant for the stability of interface states, which further correlates to the long-term stability of modern stable ZnO varistor ceramics.https://www.sciopen.com/article/10.26599/JAC.2023.9220732zno varistor ceramicsagingpower lossoxygen adsorptioninterface states |
| spellingShingle | Zhuolin Cheng Rou Li Yiwei Long Jianying Li Shengtao Li Kangning Wu Power loss transition of stable ZnO varistor ceramics: Role of oxygen adsorption on the stability of interface states at the grain boundary Journal of Advanced Ceramics zno varistor ceramics aging power loss oxygen adsorption interface states |
| title | Power loss transition of stable ZnO varistor ceramics: Role of oxygen adsorption on the stability of interface states at the grain boundary |
| title_full | Power loss transition of stable ZnO varistor ceramics: Role of oxygen adsorption on the stability of interface states at the grain boundary |
| title_fullStr | Power loss transition of stable ZnO varistor ceramics: Role of oxygen adsorption on the stability of interface states at the grain boundary |
| title_full_unstemmed | Power loss transition of stable ZnO varistor ceramics: Role of oxygen adsorption on the stability of interface states at the grain boundary |
| title_short | Power loss transition of stable ZnO varistor ceramics: Role of oxygen adsorption on the stability of interface states at the grain boundary |
| title_sort | power loss transition of stable zno varistor ceramics role of oxygen adsorption on the stability of interface states at the grain boundary |
| topic | zno varistor ceramics aging power loss oxygen adsorption interface states |
| url | https://www.sciopen.com/article/10.26599/JAC.2023.9220732 |
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