添加元素对Gd_(0.73)Tb_(0.27)合金磁热性能的影响  

Influence of Additional Elements on Magnetocaloric Effect for Gd_(0.73)Tb_(0.27) Alloy

作　　者：李士涛[1] 侯雪玲[1] 张岸[1] 

机构地区：[1]上海大学,上海200072

出　　处：《稀有金属材料与工程》2007年第11期1964-1966,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：对Gd1-xTbx合金的磁热性能进行了研究。结果表明:Gd0.73Tb0.27的绝热温变比纯度为99.9%的Gd大,居里温度比Gd低14K,其磁热性能优于Gd。添加元素对Gd0.73Tb0.27磁热性能的影响表明:Dy的添加使Gd0.73Tb0.27的最大绝热温变略有减小,但仍保持比纯度为99.9%的Gd大;少量Nd的加入可显著降低居里温度,使最大绝热温变略有减小,它是十分有效的制冷温区调节剂;少量Fe的加入可提高居里温度,同时又能保持较大的绝热温变;Ge的添加使Gd0.73Tb0.27合金的最大绝热温变有所减小,居里温度基本不变。The magnetocaloric effects of Gd1-xTbx are researched in this article. Experiments results show that the adiabatic temperature change （A 7） of Gd0.73Tb0.27 is higher than the pure Gd of 99.9%, and the Curie temperature is 14 K lower than the pure Gd of 99.9%. The influence of additional elements on the magnetocaloric effect of Gd0.73Tb0.27 alloy is also researched. It is found that the addition of Dy makes A T of Gd0.73Tb0.27 decrease a little, but still keep a larger A T than pure Gd. A small amount addition of Nd can lower Curie temperature of Gd0.73Tb0.27 remarkably and make A T decrease a little, suitable for the regulator in the refrigerating temperature range. A small amount addition of Fe increases Curie temperature and keeps a larger A T for the Gd0.73Tb0.27. The addition of Ge to Gd0.73Tb0.27 decreases the A T slightly and keeps the Curie temperature constant nearly.

关 键 词：室温磁制冷 GdTb合金 磁热性能 绝热温变 

分 类 号：TG113.225[金属学及工艺—物理冶金]