(中山大學(xué)物理系，廣州510275)
摘 要: 采用急冷快誶，高能球磨及粉末包套包覆軋制方法制備出Gd-Y，Gd-Zn和Gd-Tb的納米固體復(fù)合磁致冷材料。實(shí)驗(yàn)測試結(jié)果表明：與大塊狀材料相比。納米固體的居里溫度明顯降低，比熱顯著增加；Gd-Tb和Gd-Zn合金的磁熱熵效應(yīng)有所降低，但Gd-Y系的磁熱熵效應(yīng)則顯著增加。對制備工藝條件及若干影響磁熱熵效應(yīng)的因素進(jìn)行了較詳細(xì)的分析。
關(guān)鍵字: 納米復(fù)合材料 磁致冷 稀土 變形
（Department of Physics,Zhoregshan University, Guangzhou 510275）
Abstract:The nanocomposite solids of rare-earth alloys Gd-Y, Gd-Zn and Gd-Tb for magnetic refrigerant have been prepared by means of rapid quenching and ball-milling as well as powder coating-rolling. It turns out that both Curie temperature and specific heat of the prepared nanocomposite solids，compared with the bulk mate-rials,show obviously decrease and increase respectively. The magnetocaloric effect(MCE) of Gd-Y alloy demon-strates an unique raising rather than reducing of both Gd-Tb and Gd-Zn. A discussion concerning the influence of preparing parameters on magnetocaloric effect is given in detail.
Key words: nanocomposite solids magnetic refrigeration rare-earth mechanical deforming
