从室温磁制冷商品化角度出发,用工业纯原料,对用不同工艺(甩带、铸锭)制作的LaFe11.9-xCoxSi1.1B0.25(x=0.7,0.8)合金的磁热效应作了研究.研究结果表明,铸锭样品的磁热效应优于甩带样品,在1.5T磁场下,铸锭LaFe11.2Co0.7Si1.1B0.25样品的温变最大值达到2.6K,对应的温度在-6℃左右.随着Co的加入,居里温度升高,但磁热效应有所降低.
参考文献
| [1] | Z. B. Guo;J. R. Zhang;H. Huang .Large magnetic entropy change in La↓(0.75) Ca↓(0.25) MnO↓(3)[J].Applied physics letters,1997(5/8):904-905. |
| [2] | Pecharsky V K;Gschneidner Jr K A .The giant magnetocaloric effect in Gd5(SixGe1-x)4 materials for magnetic refrigeration[J].Advances in Cryogenic Engineering,1997,43:16-20. |
| [3] | H. Wada;Y. Tanabe .Giant magnetocaloric effect of MnAs_(1-x)Sb_(x)[J].Applied physics letters,2001(20):3302-3304. |
| [4] | Tegus O .Novel materials for magnetic rerigeration[D].Amsterdam:University of Amsterdam,2003. |
| [5] | Feng-xia Hu;Bao-gen Shen;Ji-rong Sun;Zhao-hua Cheng;Guang-hui Rao;Xi-xiang Zhang .Influence of negative lattice expansion and metamagnetic transition on magnetic entropy change in the compound LaFe_(11.4)Si_(1.6)[J].Applied physics letters,2001(23):3675-3677. |
| [6] | S. Fujieda;A. Fujita;K. Fukamichi;Y. Yamazaki;Y. Iijima .Giant isotropic magnetostriction of itinerant-electron metamagnetic La(Fe_(0.88)Si_(0.12))_(13)H_(y) compounds[J].Applied physics letters,2001(5):653-655. |
| [7] | 黄焦宏,松林,金培育,王高峰,刘金荣,闫宏伟,张久兴.LaFe11.17-xCo0.78Si1.05Bx合金磁热效应的研究[J].功能材料,2006(12):1888-1890. |
| [8] | 宫继成 .LaFeCoSi基化合物室温磁热效应的研究[D].呼和浩特:内蒙古工业大学,2007. |
| [9] | F. X. Hu;X. L. Qian;J. R. Sun;G. J. Wang;X. X. Zhang;Z. H. Cheng;B. G. Shen .Magnetic entropy change and its temperature variation in compounds La(Fe_(1-x)Co_(x))_(11.2)Si_(1.8)[J].Journal of Applied Physics,2002(7):3620-3623. |
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