| 稀土纳米磁致冷复合材料 |
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| 引用本文： | 邵元智 熊正烨. 稀土纳米磁致冷复合材料[J]. 中国有色金属学报, 1996, 6(1): 70-73,78 |
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| 作者姓名： | 邵元智 熊正烨 |
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| 作者单位： | 中山大学物理系 |
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| 基金项目： | 广东省科委基金及中山大学科学基金 |
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| 摘 要： | 采用急冷快淬，高能球磨及粉末包套包覆轧制方法制备出Ｇｄ－Ｙ，Ｇｄ－Ｚｎ和Ｇｄ－Ｔｈ的纳米固体复合磁致冷材料。实验测试结果表明：与大块状材料相比，纳米固体的居里温度明显降低，比热显著增加：Ｇｄ－Ｔｈ和Ｇｄ－Ｚｎ合金的磁热熵效应有所降低，但Ｇｄ－Ｙ系的磁热熵效应则显著增加。对制备工艺条件及若干影响磁质变熵效应的因素进行了较详细的分析。
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| 关 键 词： | 纳米材料 复合材料 磁致冷 稀土 变形 |
PREPARATION OF RARE-EARTH NANOCOMPOSITE SOLIDS FOR MAGNETIC REFRIGERATION |
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| Shao Yuanzhi, Xiong Zhengye, Zhang Jieli. PREPARATION OF RARE-EARTH NANOCOMPOSITE SOLIDS FOR MAGNETIC REFRIGERATION[J]. The Chinese Journal of Nonferrous Metals, 1996, 6(1): 70-73,78 |
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| Authors: | Shao Yuanzhi Xiong Zhengye Zhang Jieli |
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| Abstract: | The nanocomposite solids of rare-earth alloys Gd-Y, Gd-Zn and Gd-Tb for magnetic refrigerant have been prepared by means of rapid quenching and ball-milling as well as powder coating-rolling. It turns out that both Curie temperature and specific heat of the prepared nanocomposite solids, compared with the bulk materials, show obviously decrease and increase respectively. The magnetocaloric effect(MCE) of Gd-Y alloy demonstrates an unique raising rather than reducing of both Gd-Tb and Gd-Zn. A discussion concerning the influence of preparing parameters on magnetocaloric effect is given in detail. |
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| Keywords: | nanocomposite solids magnetic refrigeration rare-earth mechanical deforming |
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