黃 暉1， 王秋良1， 嚴(yán)陸光1
( 1. 中國(guó)科學(xué)院 電工研究所， 北京 100080；
2. 上海大學(xué) 材料科學(xué)與工程學(xué)院， 上海 200072)
摘 要: 從熱力學(xué)基本原理出發(fā)初步分析了強(qiáng)磁場(chǎng)磁化對(duì)純物質(zhì)吉布斯自由能和平衡凝固溫度的影響。結(jié)果表明， 磁場(chǎng)中順磁性純物質(zhì)的吉布斯自由能降低， 平衡凝固溫度升高； 抗磁性純物質(zhì)的吉布斯自由能升高， 平衡凝固溫度降低。 利用強(qiáng)磁場(chǎng)有可能在材料中形成大的整體過(guò)冷，可實(shí)現(xiàn)材料的整體凝固。
關(guān)鍵字: 強(qiáng)磁場(chǎng)； 凝固； 熱力學(xué)； 純物質(zhì)； 熔點(diǎn)
HUANG Hui1, WANG Qiu-liang1, YAN Lu-guang1
（ 1. Institute of E1ectrical Engineering,
Chinese Academy of Sciences, Beijing 100080, China;
2. School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China）
Abstract: Based on the principles of thermodynamics, the changes of Gibbs free energy and melting equilibrium temperature of pure materials caused by magnetization in a high magnetic field were analyzed. It is proposed that under the influence of magnetic field, the Gibbs free energy is decreased and the melting point is increased for a paramagnetic pure material, and all in verse for a diamagnetic one. It is hopeful that the undercooling induced by a high magnetic field is big enough to make a whole solidification of bulk materials occurred.
Key words: high magnetic field; solidification; thermodynamics; pure material; melting point
