公开(公告)号：US20130200293A1

公开(公告)日：2013-08-08

申请号：US13514960

申请日：2010-12-01

申请人： Jinliang Zhao ,  Baogen Shen ,  Fengxia Hu ,  Jun Shen ,  Yangxian Li ,  Jirong Sun ,  Huayang Gong ,  Jianxiong Yin ,  Xiaohuan Wang

发明人： Jinliang Zhao ,  Baogen Shen ,  Fengxia Hu ,  Jun Shen ,  Yangxian Li ,  Jirong Sun ,  Huayang Gong ,  Jianxiong Yin ,  Xiaohuan Wang

IPC分类号： H01F1/01

CPC分类号： H01F1/012 ,  C01B6/246

摘要： The invention discloses a La(Fe,Si)13-based hydride magnetic refrigeration material comprising multiple interstitial atoms and showing a high-temperature stability and a large magnetic entropy change and the method for preparing the same. By reintroducing interstitial hydrogen atoms into an interstitial master alloy La1-aRaFe13-bSibXc through a hydrogen absorption process, a compound with a chemical formula of La1-aRaFe13-bSibXcHd and a cubic NaZn13-type structure is prepared, wherein R is one or a combination of more than one rare-earth element, X is one or more C, B and the like or their combinations. A desired amount of hydrogen is obtained through a single hydrogen absorption process by means of controlling the hydrogen pressure, temperature and period in the process of hydrogen absorption. The compound can be stable under normal pressure, at a temperature of room temperature to 350° C., that is, the hydrogen atoms can still exist stably in the interstices. The Curie temperature of the compound can be adjusted continuously with a wide range of 180K to 360K by changing its composition. The magnetic entropy change that is more than 2 folds of that of Gd can be obtained around room temperature, and the magnetic hysteresis loss vanishes. In view of the above, this material is a desired magnetic refrigeration material applied at room temperature.

摘要翻译： 本发明公开了一种包含多个间隙原子并显示高温稳定性和大的磁熵变的La（Fe，Si）13基氢化物磁致冷材料及其制备方法。 通过氢吸收法将间隙氢原子重新插入到间隙母合金La1-aRaFe13-bSibXc中，制备化学式为La1-aRaFe13-bSibXcHd的化合物和立方体NaZn13型结构，其中R是一个或组合 的多于一种的稀土元素，X是一个或多个C，B等或它们的组合。 通过控制氢气压力，氢吸收过程中的氢气压力，温度和时间，通过单一氢气吸收过程获得所需量的氢。 化合物在常压下，在室温至350℃的温度下可以是稳定的，即氢原子仍然可以稳定地存在于间隙中。 化合物的居里温度可以通过改变其组成而以180K至360K的宽范围连续调节。 可以在室温附近获得超过Gd的2倍以上的磁熵变，磁滞损耗消失。 鉴于上述，该材料是在室温下施加的期望的磁性制冷材料。