硅酸盐学报2022，Vol.50Issue(12)：3270-3275,6.DOI:10.14062/j.issn.0454-5648.20220528
CrK(SO4)2·12H2O晶体的生长及其磁制冷性能
Growth and Characterization of CrK(SO4)2·12H2O Crystals Used in Magnetic Adiabatic Refrigerator
摘要
Abstract
Paramagnetic salts perform satisfactorily in cryogenic refrigeration,and hydrated salt crystals are usually used as refrigerated materials at a rather low temperature.In this paper,a chromium potassium alum CrK(SO4)2·12H2O(CPA)single crystal with the size of 32 mm×32 mm×20 mm was grown by a slow cooling method.The relationship between the growth condition and crystal morphology was analyzed,and the thermal behavior,infrared spectrum,and magnetic performance of CPA crystal were also investigated.The results reveal that the CPA crystal exhibits a magnetocaloric effect up to 29.75 J·kg-1·K-1 in an applied magnetic field of 7 T at 2 K.A salt pill made by growing the CPA crystals on an array of copper wires in a sealed container was used in a two-stage single-shot adiabatic demagnetization refrigerator,obtaining a no-load temperature of 90 mK.关键词
晶体生长/晶体形貌/顺磁盐材料/磁热效应Key words
crystal growth/crystal morphology/paramagnetic materials/magnetocaloric effect分类
社会科学引用本文复制引用
陈语葳,刘萍,刘旺,王昌,戴巍,沈俊,张国春,涂衡..CrK(SO4)2·12H2O晶体的生长及其磁制冷性能[J].硅酸盐学报,2022,50(12):3270-3275,6.基金项目
国家自然科学基金(52088101,51925605,51972314). （52088101,51925605,51972314）
