镧铁硅合金已被广泛认可为一种实用性室温磁制冷材料,但通常需要至少一周的退火才能形成其主相,而且在低硅含量的单相成分极难合成。最近,中国科学院宁波材料技术与工程研究所稀土磁性功能材料实验室通过相图精确定位,找到一种富稀土镧的非化学计量比成分范围,发现在该类成分内仅需要数小时即可快速形成镧铁硅主相,且主相的硅含量较低使得磁热性能有所提高,这将有利于缩短高性能磁热材料的制备周期。并且,研究人员利 Lanthanum iron-silicon alloys have been widely accepted as a practical room temperature magnetic refrigeration material, but usually require at least one week of annealing to form the main phase, and the low silicon content of single-phase composition is extremely difficult to synthesize. Recently, the Institute of Materials Science and Engineering, Institute of Materials Science and Engineering, Chinese Academy of Sciences of rare earth magnetic functional materials through phase diagram accurate positioning to find a rare earth-rich lanthanum than the stoichiometric composition range and found that only hours in the composition of this type can be quickly The formation of lanthanum iron and silicon main phase, and the main phase of the lower silicon content makes the magnetocaloric performance has improved, which will help to shorten the preparation cycle of high performance magnetocaloric materials. And, researchers Lee