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  4. NaZn13型LaFe基室温磁致冷材料研究进展

材料导报, 2011, 25(15): 15-20.

NaZn13型LaFe基室温磁致冷材料研究进展

李军锁 1, , 董中奇 2, , 尹素华 3, , 涂赣峰 4,

1.河北工业职业技术学院金属材料工程系,石家庄050000

2.河北工业职业技术学院金属材料工程系,石家庄050000

3.河北工业职业技术学院金属材料工程系,石家庄050000

4.东北大学材料与冶金学院,沈阳110004

基金项目:   河北省科技支撑项目基金(11215115D)   河北工业职业技术学院引进人才科研启动(BZ1001)  

关键词： LaFe基化合物 , 稀土 , 室温磁制冷材料 , 磁热效应 , 等温磁熵变

Research Advance on NaZn13-tpye LaFe-based Compounds Magnetic Refrigerating Material at Room Temperature

LI Junsuo 1, , DONG Zhongqi 2, ,

1.河北工业职业技术学院金属材料工程系,石家庄050000

2.河北工业职业技术学院金属材料工程系,石家庄050000

Keywords： LaFe-based compounds , rare earth , magnetic refrigerating material , magnetocaloric effect , isothermal magnetic entropy change

介绍了LaFe基室温磁制冷材料在制备和磁热效应方面的研究进展.具有NaZn13型结构的LaFe基化合物中含有高的Fe含量,是良好的软磁材料.LaFe基化合物的居里温度可以通过Co取代Fe或添加非金属元素H、C、B等来提高；应用甩带和其他稀土元素取代La可以缩短制备NaZn13的退火时间.通过调整LaFe基化合物的元素配比可能会制备出具有巨磁热效应的室温磁制冷材料.

The progress in magnetocaloric effect and preparation methods of LaFe-based compounds is introduced.LaFe-based compounds of high Fe content are excellent soft magnetic materials with NaZn13 structure.The Curie temperature of the LaFe-based compounds can be increased by substituting a small mount of Co for Fe and addition H,C,B in it.The annealing time can be shortened that LaFe-based compounds with NaZn1.3 structure are prepared by melt spring or substituting a small mount of rare earths for La.The LaFe-based compounds with an appropriate ratio of elements can produce giant magnetocaloric effect at room temperature.

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