1. Mechanism of superior charge suppression behavior of Si3N4 ceramics at solid-gas interface.
- Author
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Yang, Xiao, Qi, Bo, Yan, Jiaxuan, Li, Li, Yang, Zhuodong, Zhang, Yi, Lu, Licheng, Yan, Faqiang, and Li, Chengrong
- Subjects
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GAS-solid interfaces , *SURFACE charges , *CARRIER density , *SPACE charge , *CERAMICS , *CHARGE injection - Abstract
Recent study has found excellent bulk and surface insulation property of Si 3 N 4 ceramic which make it potential to serve as key insulation component in various energy transmission apparatus. Charge accumulation at gas-solid interface is a critical insulation property but few relevant study on Si 3 N 4 can be found. This contribution has investigated the surface charge property of Si 3 N 4 ceramic compared to traditional insulation polymer under different electrical-thermal stress. Through its comparison with the electric field distribution, the main source of the surface charge accumulation is analyzed, indicating that the superior surface charge suppression performance of Si 3 N 4 lies on its low carrier density and conduction barrier, which considerably prevent charge injection and suppress the normal electric field which drives the charge to the gas-solid interface. The proposed mechanism is also validated by the characterization on conducting and space charge property for Si 3 N 4 as well as dynamic simulation on surface charge accumulation. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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