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Mn原材料纯度对Mn1.2Fe0.8P0.74Ge0.26化合物 磁热性能的影响研究

发表时间:2016-09-30  浏览量:1184  下载量:273
全部作者: 刘丹敏,孟庆普,张振路,王少博
作者单位: 北京工业大学固体微结构与性能研究所
摘 要: MnFePGe系列化合物具有优异的磁热性能,且主要原材料广泛易得,是有望大规模生产的室温磁制冷材料,但由于高纯度的原材料价格昂贵,给实际的推广应用带来了不便。为研究在不影响材料磁热性能的前提下降低成本的途径,分别采用纯度为99.99%、99.6%和99%的Mn粉,结合机械合金化和放电等离子烧结技术制备Mn1.2Fe0.8P0.74Ge0.26化合物,研究Mn粉纯度对该化合物磁热性能的影响。结果表明,低纯度的Mn粉并未显著降低该化合物的磁热性能。综合考虑成本的节约,选用适当低纯度的Mn粉有利于实际应用。
关 键 词: 金属磁性材料;MnFePGe;磁热效应;低纯度Mn粉
Title: Influence of the Purity of Raw Material Mn on the Magnetocaloric Effect of Mn1.2Fe0.8P0.74Ge0.26 Compounds
Author: LIU Danmin, MENG Qingpu, ZHANG Zhenlu, WANG Shaobo
Organization: Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology
Abstract: MnFePGe compounds combine with excellent magnetocaloric performance and easily available raw materials which are expected to scale up for room-temperature magnetic refrigerant materials. But the costly high-purity raw materials make their applications inconvenient. How to cut the cost without affecting their performances is our purpose. In this paper, Mn1.2Fe0.8P0.74Ge0.26 compounds with 99.99%, 99.6% and 99% purity of Mn powders were prepared by mechanical alloying and spark plasma sintering, and the influence of Mn powders, purity on magnetocaloric effect was investigated. It showed that the Mn powders with low purity had no great influence on magnetocaloric performance. Thus considering the cost saving, properly lowering the purity of Mn powders is good to the practical applications.
Key words: metallic magnetic materials; MnFePGe; magnetocaloric effect; low purity Mn powder
发表期数: 2016年9月第18期
引用格式: 刘丹敏,孟庆普,张振路,等. Mn原材料纯度对Mn1.2Fe0.8P0.74Ge0.26化合物 磁热性能的影响研究[J]. 中国科技论文在线精品论文,2016,9(18):1868-1873.
 
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