共晶盐低温反复相变的晶体变化

doi:10.3981/j.issn.1000-7857.2013.h2.014

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摘要以氯化钠作为共晶盐研究对象,探讨共晶盐反复多次的低温液-固相变后的晶体变化趋势。通过X射线衍射仪对试样相变前后的晶体的晶面间距、粒径等参数进行分析,判断其晶体结构的变化趋势。同时通过同步热分析仪、电导率仪分析试样相变前后的潜热、电导率的变化趋势。分析结果表明,共晶盐经过反复多次的相变后,晶体粒径从微米级逐渐向纳米级转变,有向无定形非晶体转化的趋势;同时,相变温度、潜热与电导率呈下降趋势。

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关键词 ：共晶盐, 低温, 相变, 晶体, 非晶体

Abstract：Sodium chloride was researched as the eutectic salt, and its crystal change after cryogenic repeated liquid-solid phase transition was analyzed by using an X-ray diffractometer. The analysis results show that the crystal grain size changes from micron to nanoscale, having the trend to form amorphous. At the same time, phase-transition temperature, latent heat and conductivity were declining.

Key words： eutectic salt cryogenic phase transition crystal amorphous

收稿日期: 2013-03-28

ZTFLH:

TQ115

引用本文:

黎涛;于亮;宋文吉;张建军;冯自平. 共晶盐低温反复相变的晶体变化[J]. , 2013, 31(28-29): 81-83.
LI Tao;YU Liang;SONG Wenji;ZHANG Jianjun;FENG Ziping. Crystal Changes of Eutectic Salt After Cryogenic Repeated Phase Transition. , 2013, 31(28-29): 81-83.

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http://www.kjdb.org/CN/10.3981/j.issn.1000-7857.2013.h2.014 或 http://www.kjdb.org/CN/Y2013/V31/I28-29/81