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SPS制備Mn1.2Fe0.8P0.76Ge0.24室溫磁制冷材料
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Preparation of Mn1.2Fe0.8P0.76Ge0.24 Room Temperature Magneto-Caloric Materials by SPS
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    摘要:

    利用機(jī)械合金化和放電等離子燒結(jié)技術(shù)制備Mn1.2Fe0.8P0.76Ge0.24室溫磁制冷材料。采用XRD、SEM分析燒結(jié)樣品的相結(jié)構(gòu)和顯微組織，發(fā)現(xiàn)燒結(jié)樣品顯微組織均勻致密，但是存在少量MnO、Fe3Mn4Ge6雜質(zhì)相。利用DSC測試樣品的熱流對溫度的變化曲線，并計(jì)算出熵變隨溫度的變化關(guān)系。結(jié)果顯示，Mn1.2Fe0.8P0.76Ge0.24的居里溫度TC在–10 ℃左右，在–7 ℃的時磁熵變?yōu)?3 J/(kg·K)

    Abstract:

    Mn1.2Fe0.8P0.76Ge0.24 room temperature magneto-caloric compounds were prepared by mechanical alloying and subsequent spark plasma sintering (SPS) technique. XRD and SEM were used to analyze the phase composition and the microstructure of the sintered bulk samples. Results show that the sintered bulk samples have homogeneous and compact microstructure, but with a little MnO and Fe3Mn4Ge6. DSC curve of the sintered bulk Mn1.2Fe0.8P0.76Ge0.24 compound shows that the Curie temperature TC of the sample is around –10 oC, and at –7 oC the magnetic entropy change is 23 J/(kg·K)

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張同亮,劉丹敏,饒光輝,王 通,岳 明,張久興. SPS制備Mn1.2Fe0.8P0.76Ge0.24室溫磁制冷材料[J].稀有金屬材料與工程,2011,40(9):1680~1682.[Zhang Tongliang, Liu Danmin, Rao Guanghui, Wang Tong, Yue Ming, Zhang Jiuxing. Preparation of Mn1.2Fe0.8P0.76Ge0.24 Room Temperature Magneto-Caloric Materials by SPS[J]. Rare Metal Materials and Engineering,2011,40(9):1680~1682.]
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  • 收稿日期:2010-09-10
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