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MAGNETOCALORIC EFFECT MATERIAL WITH LOW HYSTERESIS LOSS BASED ON FIRST-ORDER PHASE TRANSITION LA(FE,SI)13, AND PREPARATION METHOD AND USE THEREOF
MAGNETOCALORIC EFFECT MATERIAL WITH LOW HYSTERESIS LOSS BASED ON FIRST-ORDER PHASE TRANSITION LA(FE,SI)13, AND PREPARATION METHOD AND USE THEREOF
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机译：基于一阶相变LA（FE，SI） 13 的低磁滞损耗的磁热效应材料及其制备方法和用途
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摘要
Provided in the present invention are a magnetocaloric effect material with a low hysteresis loss based on first-order phase transition La(Fe,Si)13, and a preparation method and use thereof. The material has a structure of NaZn13 type, particles with a particle size of 15-200 μm and not less than 15 μm, a chemical general formula of La1-xRx（Fe1-p-qCopMnq）13-ySiyAα. The method for preparing the material comprises: preparing La1-xRx（Fe1-p-qCopMnq）13-ySiyAα material by melting and annealing, and then manufacturing powder with a particle size in the range 15-200 μm. When the components are maintained constant, adjusting the grain size within the range 15-200 μm enables a La(Fe,Si)13-based magnetocaloric effect material with low hysteresis loss and strong magnetocaloric effect to be obtained, which are of great importance in the actual application of such a material in magnetic refrigeration. When the particle size is below 10 μm, the magnetocaloric effect material loses stability, and the magnetic entropy change amplitude is greatly reduced, so the material is no longer suitable for actual application in magnetic refrigeration technology. Therefore, screening off the particles with a particle size of less than 10 μm during the actual application of the material can maintain the strong magnetocaloric effect of the material to the maximum extent.
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机译：本发明提供一种基于一阶相变La（Fe，Si） 13 的磁滞损耗低的磁热效应材料及其制备方法和用途。该材料具有NaZn 13 型结构，粒径为15-200μm且不小于15μm，化学通式为La 1-x R x （Fe 1-pq Co p Mn q ） 13-y Si y A α。该材料的制备方法包括：制备La 1-x R x （Fe 1-pq Co p Mn q ） 13-y Si y A α材料通过熔化和退火，然后制造具有粒径在15-200μm的范围内。当组分保持恒定时，将晶粒尺寸调节在15-200μm的范围内，可以获得具有低磁滞损耗和强磁热效应的La（Fe，Si） 13 基磁热效应材料。在磁性制冷中这种材料的实际应用中非常重要。当粒径小于10μm时，磁热效应材料失去稳定性，并且磁熵变幅度大大减小，因此该材料不再适合于磁性制冷技术的实际应用。因此，在材料的实际应用期间筛出小于10μm的粒径的颗粒可以最大程度地保持材料的强磁热效应。
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