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| Design and Preparation of Mn-based Antipervoskite Magnetic Refrigerant Composites with Wide Temperature Range |
LIANG Pengli, YAN Jun( ), WEI Shijie, JIANG Congji, CHEN Yunlin |
| Institute of Applied Micro-Nano Materials, School of Science, Beijing Jiaotong University, Beijing 100044, China |
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Cite this article:
LIANG Pengli, YAN Jun, WEI Shijie, JIANG Congji, CHEN Yunlin. Design and Preparation of Mn-based Antipervoskite Magnetic Refrigerant Composites with Wide Temperature Range. Chinese Journal of Materials Research, 2022, 36(2): 133-139.
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Abstract Polycrystalline compounds of Mn3Sn1-x Cu x C1-x N x were synthesized by solid-state reaction with Mn3SnC and Mn3CuN as raw materials. The phase transition temperature of Mn3Sn1-x Cu x C1-x N x continuously changes with the variation of the Mn3SnC content. The compounds present platform-shaped magnetic entropy-temperature curves around room temperature. Compared with Mn3SnC, the magnetic cooling temperature range of the compounds changed from 275~285 K to 220~300 K, and the full width at half maximum of magnetic entropy change curve increased from 5 K to 70 K. However, the magnetic entropy of the compounds decreased significantly. The relationship among the maximum of magnetic entropy change, the half-height width of the magnetic entropy change curve for the compounds and the relative cooling power of the monomer materials was acquired. The competition between expanding the cooling temperature range and increasing the magnetic entropy change can be well understood. This quantitative formula is of significance in the field not only for the antiperovskite materials, but also for other magnetic refrigerant composites. In this work a new calculation and prediction method of magnetic refrigerant composites were proposed based on the heat flow curve of monomer material, and it could greatly simplify the design process of composite materials.
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Received: 15 April 2021
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| Fund: National Natural Science Foundation of China(51802014);the Fundamental Research Funds for the Central Universities(2019JBM06 8) |
About author: YAN Jun, Tel: 18701457461, E-mail: yanjun@bjtu.edu.cn
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