Si对LaFe(12.3-x)Co(0.7)SixB(0.25)系列合金的磁热效应影响  

Influence of Si on Magnetocaloric Effect of LaFe_(12.3-x)Co_(0.7)Si_xB_(0.25)Series Alloy

作　　者：宋博宇[1] 生利英[1] 张毅[1] 闫宏伟[2] SONG Boyu SHENG Liying ZHANG Yi YAN Hongwei(Material Engineering Department, Baotou Vocational ＆ Technical College, Baotou 014030, China Baotou Research Institute of Rare Earth, Baoton 014030, China)

机构地区：[1]包头职业技术学院材料工程系,内蒙古包头014030 [2]包头稀土研究院,内蒙古包头014030

出　　处：《材料开发与应用》2016年第6期66-69,共4页Development and Application of Materials

摘　　要：通过对LaFe_(12.3-x)Co_(0.7)Si_xB_(0.25)(x=1.1,1.2,1.3,1.4,1.5,1.6)合金的磁热效应的研究,发现随着合金元素Si含量的增加可以提高材料的居里温度,但会使材料的绝热温变值有所下降。针对绝热温变值最大的LaFe_(12.3-x)Co_(0.7)Si_xB_(0.25)合金进行进一步研究,发现该合金能够促进主相(NaZn13相)的生成和扩散反应进行。且该合金的最大磁熵变为7.3 J/kg·K,是工业纯Gd的2.2倍,具有一定的研究价值。Magnetocaloric effect of LaFe（12.3-x）Co（0.7）SixB（0.25）（ x = 1. 1,1. 2,1. 1,1. 2,1. 5,1. 6） alloy was investigated and it was found that the increasing Si content could elevate the Curie temperature of the material,but could decrease the material of adiabatic temperature. Further LaFe（11. 2）Co（0. 7）Si（1. 1）B（0. 25） alloy having the highest adiabatic temperature change,found that the alloy could promote generation and diffusion reaction of the main phase（ Na Zn13 phase）. And the biggest magnetic entropy into the alloy was 7. 3 J / kg,K,2. 2 times of pure Gd.

关 键 词：LaFeCoSiB 磁热效应 磁致冷 

分 类 号：TM271[一般工业技术—材料科学与工程]