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Magnetic Cooling

Journal of Rare Earths 2005年第4期23卷 I0001-I0002页

作者： karl A. gschneidner jr. Materials and Engineering Physics Ames Laboratory Department of Materials Science and Engineering Iowa State University Ames IA 50011-3020 USAMaterials and Engineering Physics Ames Laboratory Department of Materials Science and Engineering Iowa State University Ames IA 50011-3020 USA

The world has become highly dependent on reliable refrigeration technology. Without it, our food supply would be still seasonal and limited to locally produced nonperishable items; comfortable living conditions via climate control would be impossible; and certain medical advancements, e.g. MRI diagnostics, organ transplantation, organ and tissue cryo-storage, and cryo-surgery would be impossible. This technology remains essentially unchanged since it was invented 100 years ago.

关键词： Magnetic Cooling

Rare Earths and Magnetic Refrigeration

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Journal of Rare Earths 2006年第6期24卷 641-647页

作者： karl A gschneidner Vitalij K Pecharsky Materials and Engineering Physics Program Ames Laboratory and Department of Materials Science and Engineering Iowa State University Ames Iowa USAJr. Materials and Engineering Physics Program Ames Laboratory and Department of Materials Science and Engineering Iowa State University Ames Iowa USA

Magnetic refrigeration is a revolutionary, efficient, environmentally friendly cooling technology, which is on the threshold of commercialization. The magnetic rare earth materials are utilized as the magnetic refrigerants in most cooling devices, and for many cooling application the Nd2Fe14B permanent magnets are employed as the source of the magnetic field. The status of the near room temperature magnetic cooling was reviewed.

关键词： magnetic refrigeration magnetocaloric effect gadolinium Gd5 ( Si1- x Gex ) 4 La ( Fe 13 - x Six ) Hy Nd2 Fe14 B permanent magnets active magnetic regenerator cycle rare earths

Magnetocaloric effect of Pr_2Fe_(17-x)Mn_x alloys

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Rare Metals 2014年第5期33卷 552-555页

作者： Xi-Chun Zhong Zhong-Wu Liu De-Chang Zeng karl A.gschneidner jr. Vitalij K.Pecharsky School of Materials Science and Engineering South China University of Technology Ames Laboratory U.S.Department of Energy and Department of Materials Science and Engineering Iowa State University

Polycrystalline Pr2Fe17-xMnx（x = 0, 1, and 2）alloys were studied by X-ray diffraction（XRD）, heat capacity, ac susceptibility, and isothermal magnetization measurements. All the alloys adopt the rhombohedral Th2Zn17-type structure. The Curie temperature increases from 283 K at x = 0 to 294 K at x = 1, and then decreases to 285 K at x = 2. The magnetic phase transition at the Curie temperature is a typical second-order paramagnetic–ferromagnetic transition. For an applied field change from0 to 5 T, the maximum-△SM for Pr2Fe17-xMnxalloys with x = 0, 1, and 2 are 5.66, 5.07, and 4.31 J·kg^-1·K^-1,respectively. The refrigerant capacity（RC） values range from 458 to 364 J·kg^-1, which is about 70 %–89 % that of Gd. The large, near room temperature △SM and RC values,chemical stability, and a high performance-to-cost ratio make Pr2Fe17-xMnxalloys be selectable materials for room temperature magnetic refrigeration applications.

关键词： Pr2Fe17-xMnx alloys Magnetocaloric effect Magnetic entropy change

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磁制冷

中国稀土学报 2005年第4期23卷 383-384页

作者： karl A.gschneidner jr 段静芳龙毅北京科技大学材料科学与工程学院北京100083 Materials and Engineering Physics Ames Laboratory and Department of Materials Science and EngineeringIowa State University

在当今世界, 制冷起着非常重要的作用. 如果没有制冷技术, 我们要想获得新鲜的食物,依然要受季节以及地域的限制. 调节环境温度使生活环境变得舒适也将成为不可能的事情. 而且, 一些医疗方面的前沿技术, 如核磁共振成像, 器官移植, 器... 详细信息

在当今世界, 制冷起着非常重要的作用. 如果没有制冷技术, 我们要想获得新鲜的食物,依然要受季节以及地域的限制. 调节环境温度使生活环境变得舒适也将成为不可能的事情. 而且, 一些医疗方面的前沿技术, 如核磁共振成像, 器官移植, 器官和组织的低温储藏, 以及低温外科手术等都将不复存在.

关键词：磁制冷材料磁制冷技术磁卡效应

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稀土物理冶金的新进展

稀土 1989年第2期10卷 57-60页

作者： K.A.gschneidner 李培良 jr.

叙述了Nd_2Fe_(14)B磁体和terfenol磁致伸缩合金用Nd、Tb和Dy的制备,terfenol磁致伸缩合金的加工以及高纯金属方面取得的进展。讨论的其他问题包括:1) 立方LaNi_2 Laves相是否存在;2) 25℃下稀土的亚稳定bcc相;3) 多层稀土材料;4) 稀土... 详细信息

叙述了Nd_2Fe_(14)B磁体和terfenol磁致伸缩合金用Nd、Tb和Dy的制备,terfenol磁致伸缩合金的加工以及高纯金属方面取得的进展。讨论的其他问题包括:1) 立方LaNi_2 Laves相是否存在;2) 25℃下稀土的亚稳定bcc相;3) 多层稀土材料;4) 稀土用于抑制腐蚀;5) 一种可能的新永磁体的发现;6) 在定域/离域交叉点上半重费米子化合物Ce Si_x(x≈1.85)电阻率巨大异常。

关键词：稀土物理冶金钕铁硼永磁体钕 Terfenol合金提纯铽镝