第二主族氢化物的高压研究

吴刚 黄晓丽 李鑫 黄艳萍 刘明坤 崔田

吴刚, 黄晓丽, 李鑫, 黄艳萍, 刘明坤, 崔田. 第二主族氢化物的高压研究[J]. 高压物理学报, 2017, 31(6): 682-691. doi: 10.11858/gywlxb.2017.06.002
引用本文: 吴刚, 黄晓丽, 李鑫, 黄艳萍, 刘明坤, 崔田. 第二主族氢化物的高压研究[J]. 高压物理学报, 2017, 31(6): 682-691. doi: 10.11858/gywlxb.2017.06.002
WU Gang, HUANG Xiao-Li, LI Xin, HUANG Yan-Ping, LIU Ming-Kun, CUI Tian. High Pressure Investigation on the Alkaline-Earth Metal Hydride[J]. Chinese Journal of High Pressure Physics, 2017, 31(6): 682-691. doi: 10.11858/gywlxb.2017.06.002
Citation: WU Gang, HUANG Xiao-Li, LI Xin, HUANG Yan-Ping, LIU Ming-Kun, CUI Tian. High Pressure Investigation on the Alkaline-Earth Metal Hydride[J]. Chinese Journal of High Pressure Physics, 2017, 31(6): 682-691. doi: 10.11858/gywlxb.2017.06.002

第二主族氢化物的高压研究

doi: 10.11858/gywlxb.2017.06.002
基金项目: 

国家自然科学基金 51572108

国家自然科学基金 51632002

国家自然科学基金 51025206

国家自然科学基金 11274137

国家自然科学基金 11474127

国家自然科学基金 11504127

教育部长江学者和创新团队发展计划 IRT_15R23

;国家基础科学人才培养基金 J1103202

高等学校学科创新引智计划 B12011

吉林大学研究生创新基金 2016016

详细信息
    作者简介:

    吴刚(1990-), 男, 博士研究生, 主要从事高压下富氢体系研究.E-mail:wugang14@mails.jlu.edu.cn

    通讯作者:

    崔田(1964-), 男, 博士, 教授, 主要从事高压下物质结构与性质研究.E-mail:cuitian@jlu.edu.cn

  • 中图分类号: O521.2

High Pressure Investigation on the Alkaline-Earth Metal Hydride

  • 摘要: 富氢化合物的压致金属化和超导电性是实现金属氢和高温超导体的有效途径,已成为物理学、材料科学等学科的研究热点之一。从应用上看,富氢化合物是潜在的储氢材料,研究高压下富氢化合物结构和性质变化是提升其储氢性能的有效手段。以典型的第二主族氢化物为例,简要地介绍了第二主族氢化物在高压下的实验与理论研究成果,包括高压结构相变、新结构的稳定性以及金属化机制,并探讨不同的氢构型对压致金属化及超导电性的影响。

     

  • 图  MgH2在不同压力下的XRD精修结果及体积随压力的变化

    Figure  1.  Rietveld refinement for XRD pattern of MgH2 at corresponding pressure (a), and the volume per MgH2 unit as a function of pressure (b)

    图  CaH2的常压结构Pnma (a)和两种高压相结构P63/mmc (b)及P6/mmm (c)[40]

    Figure  2.  The ambient structure of CaH2 ((a) space group Pnma) and two high pressure phases P63/mmc (b) and P6/mmm (c)[40]

    图  第二主族二氢化物的高压相序(实验确定的相序与实验压力范围之外的理论预测结果分别用实线和虚线标示。涉及的参考文献:[24](BeH2)、[28, 44](MgH2)、[36, 40](CaH2)、[37](SrH2)、[38-39, 41-42](BaH2)

    Figure  3.  High pressure phase transition sequence of alkaline earth dihydrides (The results obtained in experiments are indicated with the solid lines.The theoretical predictions beyond the experimental pressure region are indicated with dash lines.Corresponding reference:[24](BeH2), [28, 44](MgH2), [36, 40](CaH2), [37](SrH2), [38-39, 41-42](BaH2).)

    图  Mg-H体系的高压结构

    Figure  4.  High pressure crystal structure of Mg-H system

    图  Ca-H体系的高压结构

    Figure  5.  High pressure crystal structure of Ca-H system

    图  150 GPa时SrH6[49]与BaH6[47]的结构

    Figure  6.  Structures of SrH6[49] (a) and BaH6[47] (b) at 150 GPa

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  • 收稿日期:  2017-07-13
  • 修回日期:  2017-07-25

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