NaZn_(13)型LaFe基室温磁致冷材料研究进展  

The Latest Development of NaZn_(13)-tpye LaFe-based Room Temperature Magnetic Refrigerant Materials

作　　者：董中奇[1] 尹素花[1] 袁志学[1] 涂赣峰[2] 

机构地区：[1]河北工业职业技术学院,河北石家庄050000 [2]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《稀有金属与硬质合金》2011年第1期39-44,共6页Rare Metals and Cemented Carbides

基　　金：引进人才科研启动基金项目资助(BZ001)

摘　　要：介绍了LaFe基室温磁致冷材料在磁热效应和制备方面的研究进展。指出具有NaZn13型结构且Fe含量高的LaFe基化合物是良好的软磁材料,其居里温度可通过Co取代Fe或添加非金属元素H、C、B等来提高;采用甩带和添加其他稀土元素取代La可缩短材料获得NaZn13型结构的退火时间。通过调整LaFe基化合物的元素配比,将有可能制备出具有巨磁热效应的室温磁致冷材料。The latest development of LaFe-based room temperature magnetic refrigerant materials is introduced in respect of their magnetocaloric effects and preparation technologies.It is indicated that NaZn13-tpye LaFe-based compound with high Fe content is an excellent soft magnetic material,and its Curie temperature can be improved by substituting Co for Fe and adding some nonmetal elements such as H,C and B.When LaFe-based compound is prepared by melt spinning and adding other lanthanon to replace La,its annealed time can be shortened to form NaZn13structure.The LaFe-based compound with an appropriate element ratio may be a room temperature magnetic refrigerant material with giant magnetocaloric effect.

关 键 词：LaFe基化合物 稀土 室温磁致冷材料 磁热效应 等温磁熵变 

分 类 号：TB64[一般工业技术—制冷工程]