Research of the preparation technic and magnetic properties of Mn2-xFexP1-yGey magneto-caloric materials - 文章详情页

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摘要：

Mn2-xFexP1-yGey(x=0.8,　0.9,　y=0.2,　0.24,　0.26)　magneto-caloric　compounds　have　been　prepared　by　mechanical　alloying　(MA)　and　subsequent　spark　plasma　sintering　(SPS)　technique.　XRD,　neutron　diffraction　and　SEM　were　used　to　analysis　the　influences　of　the　ball　milling　time,　sintering　temperature,　pressure　and　time　on　the　phase　formation　systematically.　A　stable　preparation　technique　for　the　MnFePGe　magneto-caloric　materials　was　established.　It　was　found　that　the　quantity　of　the　impurity　decreased　as　the　temperature　increasing.　The　magnetic　phase　transition　process　and　magnetocaloric　properties　of　the　Mn2-xFexP1-yGey　alloys　were　investigated　by　DSC　and　SQUID.　The　compound　Mn1.2Fe0.8P0.74Ge0.26　was　expected　to　be　a　suitable　candidate　for　a　magnetic　refrigeration　applications　with　a　small　thermal　hysteresis　(3K),　a　Curie　temperature　close　to　room　temperature　(277.4K),　and　a　large　magnetocaloric　effect　(ΔSDSC=21.5J/(kg·K).

关键词：

Curie temperature Germanium Iron alloys Iron compounds Magnetic refrigeration Manganese Mechanical alloying Neutron diffraction Spark plasma sintering

作者机构：

[ 1 ] [Zhang, Hu]Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Liu, Dan-Min]Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Wang, Shao-Bo]Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Xiao, Wei-Qiang]Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Zhang, Zhen-Lu]Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China
[ 6 ] [Yue, Ming]Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
[ 7 ] [Zhang, Jiu-Xing]Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

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