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Gd_3+xAl_2-x系合金磁热效应的直接测量

Direct Measurement of Magnetocaloric Effects in Gd_3+xAl_2-x Alloys

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【Author】 SHENG Li-ying~1,XIE Hong-wei~2,XU Lai-zi~3,HUANG Jiao-hong~3(1.Material Science and Engineering School,UST Inner Mongolia,Baotou 014010,China;2.Technology School of Iron and Steel Com.in Baotou 014010,China;3.Baotou Research Institute of Rare Earth,Baotou 014010,China)

【机构】内蒙古科技大学材料科学与工程学院；包头钢铁公司技术学校；包头稀土研究院；包头稀土研究院内蒙古包头014010；内蒙古包头0140102；内蒙古包头014010；

【摘要】用真空高频磁悬浮炉制备了Gd3Al2,Gd3.1Al1.9,Gd3.2Al1.8,Gd3.33Al1.7四种合金。用直接测量法测量了在1.5T磁场下纯Gd和样品的磁热效应。结果表明,在1.5T磁场下,Gd3Al2,Gd3.1Al1.9,Gd3.2Al1.8,Gd3.33Al1.7和纯Gd的最大绝对温变分别为2.1K,2.0K,1.6K,1.5K和3.2K;Gd3.1Al1.9的居里温度最高,为286K。更多还原

【Abstract】 Gd₃Al₂,Gd_2.9Mn_0.1Al₂,Gd_2.8Mn_0.2Al₂,Gd_2.7XMn_0.3Al₂ alloys were prepared in a high-frequency floating furnace.The magnetocaloric effects of samples and pure Gd were measured directly at the magnetic field of 1.5 Tesla.The results indicate that the maximum adiabatic temperature changes of Gd₃Al₂,Gd_3.1Al_1.9,Gd_3.2Al_1.8,Gd_3.33Al_1.7 and pure Gd by a magnetic field change of 1.5 Tesla are 2.0K,2.1K,1.6K,1.5K and 3.2K,respectively.The highest Cure temperature in Gd_3.1Al_1.9 is 286K.更多还原