Study on the Sealing Treatment and Dielectric Properties of Al2O3 Insulating Coatings
文献类型：期刊论文
| 作者 | Han, Botao1,2; Tariq, Naeem ul Haq3; Wang, Jiqiang1; Xiong, Tianying1; Li, Ning1; Cui, Xinyu1 |
| 刊名 | JOURNAL OF THERMAL SPRAY TECHNOLOGY
 |
| 出版日期 | 2025-03-13 |
| 页码 | 17 |
| 关键词 | Al2O3 insulating coating dielectric properties penetration model plasma spraying sealing treatment |
| ISSN号 | 1059-9630 |
| DOI | 10.1007/s11666-025-01948-y |
| 通讯作者 | Xiong, Tianying(tyxiong@imr.ac.cn) |
| 英文摘要 | The sealing treatment of plasma-sprayed Al2O3 insulating coatings and its effect on the microstructure and dielectric properties were systematically investigated. To compare the penetration depth of sealants, various sealing processes were employed, utilizing two types of sealants and under two different ambient pressures. The microstructure of coatings was analyzed using scanning electron microscopy, energy dispersive spectrometer, and isothermal adsorption/desorption tests. Breakdown strength, resistivity, dielectric constant (epsilon(r)), loss tangent (tan delta), and complex impedance were measured for both unsealed and sealed coatings. The results indicated that the maximum penetration depth percentage (50.8%) was achieved with the diluted sealant under low ambient pressure (20 Pa). A penetration model, that includes the ambient pressures, pore diameters, and physical properties of the sealant, was proposed and validated. The sealing treatment nearly doubled the breakdown strengths of coatings under DC, 50 Hz, and 500 Hz voltages and increased resistivity by nearly 100 times in environments with varying relative humidity (RH) levels. Additionally, the sealing treatment decreased the epsilon(r) and tan delta of coatings in a 20% RH environment and increased their impedance in both 20% RH and 80% RH environments. This study provides a theoretical basis for the design and application of sealing treatments. |
| 资助项目 | National Key Research and Development Program of China[2020YFB2007803] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001444345100001 |
| 出版者 | SPRINGER |
| 资助机构 | National Key Research and Development Program of China |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Xiong, Tianying |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Pakistan Inst Engn & Appl Sci, Dept Met & Mat Engn, Islamabad 45650, Pakistan |
| 推荐引用方式 GB/T 7714 | Han, Botao,Tariq, Naeem ul Haq,Wang, Jiqiang,et al. Study on the Sealing Treatment and Dielectric Properties of Al2O3 Insulating Coatings[J]. JOURNAL OF THERMAL SPRAY TECHNOLOGY,2025:17. |
| APA | Han, Botao,Tariq, Naeem ul Haq,Wang, Jiqiang,Xiong, Tianying,Li, Ning,&Cui, Xinyu.(2025).Study on the Sealing Treatment and Dielectric Properties of Al2O3 Insulating Coatings.JOURNAL OF THERMAL SPRAY TECHNOLOGY,17. |
| MLA | Han, Botao,et al."Study on the Sealing Treatment and Dielectric Properties of Al2O3 Insulating Coatings".JOURNAL OF THERMAL SPRAY TECHNOLOGY (2025):17. |
入库方式： OAI收割
来源：金属研究所
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