| 引用本文: | 吕明达,张广军.管形TEG的等离子喷涂制备及其热电性能∗[J].中国表面工程,2021,34(1):1~7 |
| Lv Mingda,Zhang Guangjun.Manufacturing of Tubular Thermoelectric Generator by Plasma Spray and Its Thermoelectric Property[J].China Surface Engineering,2021,34(1):1~7 |
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| 摘要: |
| 热电器件(Thermoelectric generator, TEG)利用材料内部载流子运动可实现对低品质余废热能的回收利用。 相较于热电材料的发展,TEG 制备技术的滞后制约了 TEG 的广泛应用。 针对上述问题,探索使用灵活、高成本效益的等离子喷涂技术制备高锰硅(Higher manganese silicide, HMS)基管形 TEG 的可行性,详细描述了层积型 TEG 的喷涂制备过程,并对高锰硅热电沉积层的物相组织、微观形貌进行表征,最后测试管形 TEG 热电 P-N 单元的热电输出性能。 结果表明,等离子喷涂制备的多层复合结构管形 TEG 成形良好;高锰硅沉积层作为热电功能层,喷涂后保持与原始粉末相同的 HMS 主体相,同时沉积层的快速冷却过程减少了杂质 Si 相的残余;管形 TEG 在自然散热工况下,当柱状热源为 450 ℃ 时单个 P-N 单元电压输出可达 24. 69 mV,满足超低压收集装置的电压输入要求。 |
| 关键词: 等离子喷涂 功能涂层 热电器件 高锰硅 微观组织 |
| DOI：10.11933/j.issn.1007-9289.20201211001 |
| 分类号:TM913;TG174 |
| 基金项目:国家重点研发计划(2018YFB1105800)和国家自然科学基金(52075121)资助项目 |
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| Manufacturing of Tubular Thermoelectric Generator by Plasma Spray and Its Thermoelectric Property |
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Lv Mingda, Zhang Guangjun
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College of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001 , China
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| Abstract: |
| Thermoelectric generator (TEG) can directly convert heat gradient into electricity by the motion of charge carriers. Howev- er, comparing with the development in thermoelectric materials, the difficulty in processing them into engineering devices limits TEG applications. Atmospheric plasma spraying, as a flexible and cost-effective manufacturing process, is employed to manufacture higher manganese silicide (HMS) based tubular TEG. The as-sprayed HMS deposition is characterized for phase structure and microstruc- ture. The voltage output is measured to assess the thermoelectric performance of the P-N unit in tubular TEG. The results show that a multi-layer tubular TEG is sprayed successfully. The HMS depositon keeps the same phase structure with original powder, while the volume of monatomic Si is reduced for the rapid cooling in plasma spraying. Under the ambient cooling condition, the voltage output of single P-N unit can reach 24. 69 mV when cylindrical heat source is 450 ℃ , which meets the minimum voltage input requirement of ul- tra-low energy harvesting device. |
| Key words: plasma spray functional coating thermoelectric generator higher manganese silicide microstructure |
