Grinding and particle size selection as a procedure to enhance the magnetocaloric response of La( Fe, Si)13 bulk samples

被引：15

作者：

Ipus, J. J. ^{[1
]}

Borrego, J. M. ^{[1
]}

Moreno-Ramirez, L. M. ^{[1
]}

Blazquez, J. S. ^{[1
]}

Franco, V. ^{[1
]}

Conde, A. ^{[1
]}

机构：

[1] Univ Seville, CSIC, Inst Ciencia Mat, Dept Fis Mat Condensada, POB 1065, Seville 41080, Spain

来源：

INTERMETALLICS | 2017年 / 84卷

关键词：

Magnetocaloric effect; La(Fe; Si)(13); Mossbauer spectrometry; METAMAGNETIC TRANSITION; COMPOUND LAFE11.4SI1.6; MAGNETIC REFRIGERANTS; DISTRIBUTIONS; SYSTEM;

D O I：

10.1016/j.intermet.2016.12.022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The magnetocaloric effect of La(Fe, Si)(13) samples deteriorates with the presence of secondary phases. However, it is highly challenging to produce single phase samples by conventional procedures and purification requires long annealing time. We propose grinding and particle size selection of non-optimal starting samples as procedure to enhance the magnetocaloric response. In this study a starting multi-phase LaFe11.8Si1.2 ingot was grinded and sieved to select three different particle size ranges. X-ray diffraction and Mossbauer spectrometry reveal that all samples mainly contain fcc-La(Fe, Si)(13) and bcc-Fe(Si) phases. Microstructural and magnetic results show that the fcc-La(Fe, Si)(13) phase fraction increases for samples with the smallest average particle size, increasing their magnetocaloric response in a factor larger than three with respect to that of the bulk sample. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：30 / 34

页数：5

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