物理学报Issue(19)：1-5,5.DOI:10.7498/aps.63.197501
LaFe11.5Si1.5化合物氢化特性及稳定性的研究
Study on the hydrogenation prop erties and stability of LaFe11.5Si1.5 compound
摘要
Abstract
We have studied systematically the effects of temperature, time, and pressure on the process of hydrogen absorption in LaFe11.5Si1.5 compound. Results show that hydrogen absorption can increase the lattice parameter of the compound without changing its crystal structure. The LaFe11.5Si1.5H1.6 compound can be prepared at a hydrogen pressure of 0.0987 MPa at 423 K with uniform distribution of hydrogen. Hydrogen absorption can also increase the Curie temperature obviously, decrease the thermal hysteresis and maintain the magnetic entropy change at a high standard. With prolonged exposure time in air, the variation of the Curie temperature and magnetic entropy change of LaFe11.5Si1.5H1.6 compound are very small, implying that the magnetic thermal performance of hydride alloy has a good time stability.关键词
P-C-T关系曲线/居里温度/磁熵变/LaFe11.5Si1.5氢化物Key words
P-C-T relation plot/Curie temperature/magnetic entropy change/hydrides引用本文复制引用
张登魁,赵金良,张红国,岳明..LaFe11.5Si1.5化合物氢化特性及稳定性的研究[J].物理学报,2014,(19):1-5,5.基金项目
国家自然科学基金青年科学基金(批准号:51301008)和国家自然科学基金(批准号:51071007,51171003)资助的课题.* Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No.51301008), and the National Natural Science Foundation of China (Grant Nos.51071007,51171003) （批准号:51301008）
