High-energy x-ray diffraction study on phase transition asymmetry of plastic crystal neopentylglycol

被引：0

作者：

张哲 ^{[1
,2
]}

陈艳娜 ^{[3
]}

齐迹 ^{[1
,2
]}

张召 ^{[1
,2
]}

Koji Ohara ^{[4
]}

Osami Sakata ^{[3
,4
]}

张志东 ^{[1
,2
]}

李昺 ^{[1
,2
]}

机构：

[1] Shenyang National Laboratory (SYNL) for Materials Science, Institute of Metal Research, Chinese Academy of Sciences

[2] School of Materials Science and Engineering, University of Science and Technology of China

[3] Synchrotron X-ray Group, Research Center for Advanced Measurement and Characterization,National Institute for Materials Science (NIMS)

[4] SPring-, Diffraction and Scattering Division, Center for Synchrotron Radiation Research Institute,Japan Synchrotron Radiation Research Institute

来源：

Chinese Physics B | 2022年 / 03期

关键词：

D O I：

暂无

中图分类号：

TQ223.162 [];

学科分类号：

0817 ;

摘要：

As a prototype material of colossal barocaloric effects, neopentylglycol is investigated by combining high-precision differential scanning calorimetric measurement and high-energy x-ray diffraction measurement. The diffraction data at constant temperatures indicate a first-order phase transition with thermal hysteresis as well as the phase transition asymmetry,specifically, the phase transition is completed faster at cooling than at heating. The analysis of resulting pair distribution function confirms the intermolecular disorder in the high-temperature phase. The phase transition asymmetry is quantitatively characterized by time-resolved x-ray diffraction, which is in agreement with the thermal measurement. Also, such an asymmetry is observed to be suppressed at high pressures.

引用

页码：532 / 536

页数：5

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