使用工业纯度原材料制备出La0.6Pr0.4Fe11.4Si1.6B0.2合金,用XRD和VSM分析了合金的析出相、居里温度和磁热性能,研究了吸氢放氢处理对合金磁热性能的影响。结果表明:退火合金经0.13和0.2 MPa吸氢处理后居里温度分别达到320和321 K,吸氢压力高的样品放氢困难;经0.13 MPa吸氢样品在473 K放氢后居里温度降低到室温范围。放氢导致氢化物最大磁熵变降低和相对制冷能力RCP的提高。 The La0.6Pr0.4Fe11.4Si1.6B0.2 alloy was prepared by using industrial purity raw material. The precipitation phase, the Curie temperature and the magnetocaloric property of the alloy were analyzed by XRD and VSM. The effects of hydrogen absorption and desorption on the magnetocaloric properties Impact. The results show that the Curie temperature of the annealed alloys reaches 320 and 321 K after 0.13 and 0.2 MPa hydrogen treatments, respectively. It is difficult to release hydrogen from samples with high hydrogen absorption pressure. The Curie temperature decreases after hydrogen releasing at 0.73 MPa and 473 K To room temperature range. Hydrogen release leads to a decrease in maximum magnetic entropy of hydride evolution and an increase in RCP relative cooling capacity.