热压与粘结方法制备La0.8Ce0.2Fe11.47Mn0.23Si1.3H1.8磁工质性能的对比研究  

Comparative Study on La0.8Ce0.2Fe11.47Mn0.23Si1.3H1.8 Magnetic Refrigerant with Hot Pressed Method and Podwer Bonded Method

作　　者：李坤 程娟[2] 黄焦宏[2] LI Kun;CHENG Juan;HUANG Jiaohong(Inner Mongolia University of Science and Technology,Baotou 014010 China;Baotou Research Institute of Rare Earths,Baotou 014030,China)

机构地区：[1]内蒙古科技大学,内蒙古包头014010 [2]包头稀土研究院,内蒙古包头014030

出　　处：《稀土》2018年第6期109-113,共5页Chinese Rare Earths

基　　金：国家自然科学基金项目(51761001)

摘　　要：采用热压法及粘结法制备了La0.8Ce0.2Fe11.47Mn0.23Si1.3H1.8磁工质,研究了两种方法制备出的样品的性能,对样品的相结构、微观形貌以及磁热性能等进行了研究。研究结果表明在1.5T磁场下,粘结样品的最大等温磁熵变为11.8J/(kg·K),比热压样品的最大磁熵变高(10.99J/(kg·K)),但热压样品的抗弯强度和热导率均高于粘结样品。In this paper La0.8Ce0.2Fe11.47Mn0.23Si1.3H1.8 magnetic refrigerant was prepared by hot pressed method and pod- wer bonded method respectively,the performance of the samples prepared by two methods was studied. The structure,mor- phology and morphology were researched. The experiment resutls showed that the max magnetic entropy for the boned sample is 11. 8 J/(kg·K) which is larger than that of hot pressing sample with the max magnetic property of 10. 99 J/(kg·K) at the magnetic field of 1. 5 T. The bending strength and the thermal conductivity of hot pressing sample are both better than the boned sample.

关 键 词：磁热效应 热压 粘结 磁工质 

分 类 号：TB64[一般工业技术—制冷工程]