复合粘结La_(0.8)Ce_(0.2)Fe_(11.7-x)Mn_(x)Si_(1.3)H_(1.8)磁工质的磁性能  

Magnetic Properties of Mix-Bonded La_(0.8)Ce_(0.2)Fe_(11.7-x)Mn_(x)Si_(1.3)H_(1.8) Magnetic Refrigerants

作　　者：程娟[1] 刘翠兰[1] 张光睿[1] 孙乃坤[2] 张英德[1] 金培育[1] 黄焦宏[1] Cheng Juan;Liu Cuilan;Zhang Guangrui;Sun Naikun;Zhang Yingde;Jin Peiyu;Huang Jiaohong(State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou 014030,China;School of Science,Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]包头稀土研究院白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头014030 [2]沈阳理工大学理学院,辽宁沈阳110159

出　　处：《稀有金属材料与工程》2022年第9期3153-3158,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China (52066001);Natural Science Foundation of Inner Mongolia Autonomous Region (2021MS05016);Northern Rare Earth Project (BFXT-2021-D-0013)。

摘　　要：采用中频感应炉制备La_(0.8)Ce_(0.2)Fe_(11.7-x)Mn_(x)Si_(1.3)母合金并退火,将合金饱和氢化后破碎成粉末。通过环氧树脂粘结,将居里温度T_(C)间隔为5 K的多种La_(0.8)Ce_(0.2)Fe_(11.7-x)Mn_(x)Si_(1.3)H_(1.8)(x=0.23,0.26,0.29,0.32,质量分数,%)合金粉末进行混合粘结,提高合金的磁熵半峰宽。用Versa Lab和绝热温变直接测量仪测试粘结样品的磁性能。结果表明,与单一成分粘结样品相比,混合粘结样品的最大等温磁熵变有所降低,磁熵半峰宽以及相对制冷能力有所提高。含4种成分的混合粘结样品的相对制冷能力可以达到139.2 J/kg。La_(0.8)Ce_(0.2)Fe_(11.7-x)Mn_(x)Si_(1.3)master alloys were prepared by medium frequency induction furnace,then annealed,saturatedly hydrogenated,and finally crushed into powders.The multiple components of La_(0.8)Ce_(0.2)Fe_(11.7-x)MnxSi_(1.3)H_(1.8)(x=0.23,0.26,0.29,0.32,wt%) powders with the Curie temperature(T_(C)) interval of 5 K were mix-bonded by epoxy resin to extend the full width at half maximum of magnetic entropy of alloy.The magnetic properties of the mix-bonded specimens were measured by Versa Lab and adiabatic temperature change direct test device.The maximal magnetic entropy change of the mix-bonded specimens is decreased,whereas the full width at half maximum of magnetic entropy and the relative cooling power are increased,compared with those of the single-component-bonded specimens.The maximal relative cooling power is 139.2 J/kg for the four-component-bonded specimen.

关 键 词：磁性材料 磁热效应 相对制冷能力 稀土 

分 类 号：TG132.27[一般工业技术—材料科学与工程]