La-Fe-Si based magnetic refrigeration composite material and preparation method thereof

The invention discloses a La-Fe-Si based magnetic refrigeration composite material and a preparation method thereof. La-Fe-Si based magnetic refrigeration material particles and tin-bismuth alloy particles are uniformly mixed and machined in a heat-mould-pressing manner to prepare the composite material. The mass ratio of La-Fe-Si based magnetic refrigeration materials to tin-bismuth alloys is (85-90):(10-15). The La-Fe-Si based magnetic refrigeration composite material mainly has the advantages that the composite material comprises a magnetic heat working medium and an adhesive, the porosityof the materials is reduced by the adhesive, so that the La-Fe-Si based magnetic refrigeration composite material is high in compactness, strength and magnetocaloric effect, and the problems of high hardness, large brittleness, difficulty in machining and the like of the La-Fe-Si based magnetic refrigeration materials are effectively solved. 本发明公开了种La-Fe-Si基磁制冷复合材料及其制备方法，由La-Fe-Si基磁制冷材料颗粒和锡铋合金颗粒均匀混合，经热模压加工成型制得复合材料。所述La-Fe