| Ce2Fe16.5Co0.5合金的磁熵变研究 |
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| 引用本文： | 钟喜春,曾德长,刘正义,张锦.Ce2Fe16.5Co0.5合金的磁熵变研究[J].功能材料,2005,36(3):348-349,356. |
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| 作者姓名： | 钟喜春 曾德长 刘正义 张锦 |
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| 作者单位： | 华南理工大学,机械工程学院,广东,广州,510640;华南理工大学,机械工程学院,广东,广州,510640;华南理工大学,机械工程学院,广东,广州,510640;华南理工大学,机械工程学院,广东,广州,510640 |
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| 基金项目： | 广东省自然科学基金重点资助项目(C013003);广东省稀土办重点资助项目(102-B25770);广东省高教厅重点资助项目(102-B24480);中国教育部骨干教师计划资助项目(305-D40130);华南理工大学自然科学基金资助项目(305-E5040360) |
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| 摘 要： | 在氩保护气氛中用熔炼法制备了 Ce2Fe16.5Co0.5合金,通过粉末 X射线衍射和 SQUID 磁强计研究了样品的结构和磁熵变。结果表明 Ce2Fe16.5 Co0.5合金具有菱方Th2Zn17型结构,且存在不同组分的2个相,主相Ce2(Fe,Co)17和次相 Ce(Fe,Co)7。在 242~285K宽温区出现一个磁熵变平台,从而能够满足磁Ericsson型磁致冷机的要求,这对实际磁致冷应用具有现实意义。
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| 关 键 词： | Ce2Fe16.5Co0.5合金 磁致冷 磁熵变 |
| 文章编号： | 1001-9731(2005)03-0348-02 |
Study on magnetic entropy changes in Ce2Fe16.5Co0. 5 alloy |
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| ZHONG Xi-chun,ZENG De-chang,LIU Zheng-yi,ZHANG Jin.Study on magnetic entropy changes in Ce2Fe16.5Co0. 5 alloy[J].Journal of Functional Materials,2005,36(3):348-349,356. |
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| Authors: | ZHONG Xi-chun ZENG De-chang LIU Zheng-yi ZHANG Jin |
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| Abstract: | Ce_2Fe_(16.5)Co_(0.5) alloy was prepared by arc melting under purified argon protected atmosphere. By means of X-ray diffraction pattern and SQUID magnetometer, structure and magnetic entropy changes in Ce_2Fe_(16.5)Co_(0.5) alloy was investigated. The results show that, the crystal structure was Th_2Zn_(17)-type rhombohedral for Ce_2Fe_(16.5)Co_(0.5); There were two different constituent phases in Ce_2Fe_(16.5)Co_(0.5) compound, such as main phase Ce_2(Fe,Co)_(17) and minor phase Ce(Fe,Co)_7. a platform of magnetic entropy changes appears in a wide range of temperature from 242K to 285K, it can satisfy the Ericsson-type refrigerator's requirements. These results will play a significant role in practical application of magnetic refrigeration. |
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| Keywords: | Ce_2Fe_(16 5)Co_(0 5) alloy magnetic refrigeration magnetic entropy change |
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