A time-, energy-, and cost-efficient way of preparing (MnFe)2(P,Si)-type magnetocaloric materials

作者：Wu, Muyang; Yang, Xiaorui; Zou, Runxin; Qian, Fengjiao; Hu, Shuyuan; Wang, Wenyao; Zhong, Gaoli; Miao, Xuefei^*; Xu, Feng^*

来源：Materials Letters, 2019, 236: 579-582.

DOI：10.1016/j.matlet.2018.11.039

• Magnetocaloric effect
• (MnFe)(2)(P,Si)
• Magnetic materials
• Microstructure

We have demonstrated a time-, energy-, and cost-efficient way of preparing (MnFe)(2)(P,Si)-type magnetocaloric materials, i.e., via electromagnetic levitation melting and post-annealing from industrial-grade starting materials. The structural evolution and its influence on the magnetocaloric properties during post-annealing have been intensively studied. We found that some Fe3Si-type impurity phase with a size of around 5 mu m is present in the as-prepared sample, which can be eliminated through high-temperature annealing. The sample annealed at 1373 K for 5 h shows a homogeneous element distribution and negligible amount of the impurity phase. A Delta S-max value of 17 Jkg (1) K- 1 for a field change of 2 T has be realized in the present work, which is comparable to the highest Delta S(max )values in the (MnFe)(2)(P,Si)-type samples produced via time- and energy-consuming solid-state reaction.

• 出版日期2019-2-1
• 单位南京理工大学; 南京航空航天大学