| Thermodynamical Evaluation on Magnetocaloric Effect of Magnetic Refrigerating Materials Near Room Temperature |
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| 引用本文： | 肖素芬,陈云贵,管登高,杨涛,涂铭旌. Thermodynamical Evaluation on Magnetocaloric Effect of Magnetic Refrigerating Materials Near Room Temperature[J]. 中国稀土学报(英文版), 2003, 21(6): 648-653 |
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| 作者姓名： | 肖素芬 陈云贵 管登高 杨涛 涂铭旌 |
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| 作者单位： | SchoolofMaterialsScience＆Engineering,SichuanUniversity,Chengdu610065,China |
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| 基金项目： | ProjectsupportedbyNational“863”Program (2 0 0 2AA3 2 40 10 ) |
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| 摘 要： | The relationship between isothermal magnetic entropy change △S and adiabatic temperature change △Tad was deduced according to the principles of thermodynamics. The MCE and the engineering application were discussed for Gd and several new kinds of magnetic refrigerating materials near room temperature, Gd5Si2Ge2, MnFeP0.45As0.55 and LaFe11.2Co0.7Si1.1. Isothermal entropy change is proportional to adiabatic temperature change with a factor of T/C (T is temperature, C is heat capacity). When the comparison of magnetacoloric effect is made for two different materials, we should consider isothermal entropy change as well as adiabatic temperature change.
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| 关 键 词： | 室温 磁致冷材料 磁热效应 热力学评价 MCE 稀土 |
Thermodynamical Evaluation on Magnetocaloric Effect of Magnetic Refrigerating Materials Near Room Temperature |
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| Xiao Sufen,Chen Yungui ,Guan Denggao,Yang Tao,Tu Mingjing. Thermodynamical Evaluation on Magnetocaloric Effect of Magnetic Refrigerating Materials Near Room Temperature[J]. Journal of Rare Earths, 2003, 21(6): 648-653 |
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| Authors: | Xiao Sufen Chen Yungui Guan Denggao Yang Tao Tu Mingjing |
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| Affiliation: | Xiao Sufen,Chen Yungui ~*,Guan Denggao,Yang Tao,Tu Mingjing |
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| Abstract: | The relationship between isothermal magnetic entropy change ΔS and adiabatic temperature change ΔTad was deduced according to the principles of thermodynamics. The MCE and the engineering application were discussed for Gd and several new kinds of magnetic refrigerating materials near room temperature, Gd5Si2Ge2, MnFeP0.45As0.55 and LaFe11.2Co0.7Si 1.1. Isothermal entropy change is proportional to adiabatic temperature change with a factor of T/C (T is temperature, C is heat capacity). When the comparison of magnetacoloric effect is made for two different mate rials, we should consider isothermal entropy change as well as adiabatic tempera ture change. |
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| Keywords: | s: condensed state physics magnetic refrigerating materials magnetocaloric effect rare earths |
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