添加元素Sn对Gd_5Si_2Ge_2合金磁热效应的影响  

Influence of Sn Adding on the Magnetocaloric Effect of Gd_5Si_2Ge_2 Alloy

作　　者：侯雪玲[1] 孔俊峰[1] 李士涛[1] 周邦新[1] 倪建森[1] 徐辉[1] 张少杰 

机构地区：[1]上海大学,上海200072 [2]上海洛克磁业有限公司,上海200436

出　　处：《稀有金属材料与工程》2007年第9期1605-1607,共3页Rare Metal Materials and Engineering

基　　金：上海市纳米中心'纳米稀土磁制冷工质材料的研究'资助(0352nm030)

摘　　要：为了解决Gd5Si2Ge2磁制冷合金居里点低,制冷温区狭窄问题,采用合金化的方法,利用添加元素Sn代替Si或Ge,提高了Gd5Si1.9Ge2Sn0.1材料的居里温度,同时保持工质材料Gd5Si2Ge2的巨磁热效应,并相对于Gd5Si2Ge2合金的制冷温区有了很大的拓展。The influence of Sn adding on the magnetocaloric effect of Gd5Si2Ge2 alloy has been studied in this article. It is found that the magnetic refrigeration material Gd5Si2Ge2 has a giant magnetocaloric effect. However, as a promising material, its Curie temperature （275K） is too low and the temperature range for refrigeration is too narrow, not suitable for the applications of this material. The addition of alloying element Sn, which replace the Si or Ge elements in the Gd5Si2Ge2 alloy, can enhance the Curie temperature of the alloy and keep a giant magnetocaloric effect. At the meantime, the Gd5Si2Ge2 alloy can broaden the refrigeration temperature range effectually.

关 键 词：Gd5Si2Ge2合金 磁制冷 磁热效应 

分 类 号：TG132.27[一般工业技术—材料科学与工程]