榍石的冲击高压行为与辐照损伤效应对比研究

刘孙利 白彬 贺红亮 褚健 孙亚平 王绪 王洪龙 张铭

刘孙利, 白彬, 贺红亮, 褚健, 孙亚平, 王绪, 王洪龙, 张铭. 榍石的冲击高压行为与辐照损伤效应对比研究[J]. 高压物理学报, 2019, 33(1): 011101. doi: 10.11858/gywlxb.20180546
引用本文: 刘孙利, 白彬, 贺红亮, 褚健, 孙亚平, 王绪, 王洪龙, 张铭. 榍石的冲击高压行为与辐照损伤效应对比研究[J]. 高压物理学报, 2019, 33(1): 011101. doi: 10.11858/gywlxb.20180546
LIU Sunli, BAI Bin, HE Hongliang, CHU Jian, SUN Yaping, WANG Xu, WANG Honglong, ZHANG Ming. A Comparative Study on Influence of High-Pressure Shocking and Radiation Damage on Titanite[J]. Chinese Journal of High Pressure Physics, 2019, 33(1): 011101. doi: 10.11858/gywlxb.20180546
Citation: LIU Sunli, BAI Bin, HE Hongliang, CHU Jian, SUN Yaping, WANG Xu, WANG Honglong, ZHANG Ming. A Comparative Study on Influence of High-Pressure Shocking and Radiation Damage on Titanite[J]. Chinese Journal of High Pressure Physics, 2019, 33(1): 011101. doi: 10.11858/gywlxb.20180546

榍石的冲击高压行为与辐照损伤效应对比研究

doi: 10.11858/gywlxb.20180546
基金项目: 国家自然科学基金(41372055)
详细信息
    作者简介:

    刘孙利(1989-),男,硕士,主要从事放射性废物处理与处置研究.E-mail:liusunli@126.com

    通讯作者:

    白 彬(1968-),男,主要从事放射性废物处理与处置研究. E-mail: baibin@caep.cn

    张 铭(1956-),男,主要从事放射性废物处理与处置研究. E-mail: mzhanguk@gmail.com

  • 中图分类号: O521.2

A Comparative Study on Influence of High-Pressure Shocking and Radiation Damage on Titanite

  • 摘要: 高压和辐照这两种极端条件会造成晶体材料的晶体结构发生改变或损伤。以榍石(CaTiSiO5)为研究对象,利用冲击高压和样品回收技术,探索冲击高压作用后结构的变化规律,并与辐照造成的损伤榍石作对比研究,认识冲击高压与辐照造成榍石结构损伤的异同。研究表明:冲击高压作用下,晶态的榍石出现结构损伤和非晶化,出现类似于榍石的辐照损伤现象,但具体过程和受损的晶体结构有明显不同。具体表现为:X射线衍射、红外和拉曼光谱的特征峰强度减弱,谱线变宽,细节丢失;冲击高压导致晶态榍石拉曼光谱的Ti–O伸缩振动主峰出现红移,与辐照损伤蜕晶化过程出现的蓝移相反。此外,晶胞参数abc和晶胞体积V减小,与辐照损伤过程相反。

     

  • 图  榍石晶体结构示意

    Figure  1.  Schematic crystal structure of titanite

    图  样品回收装置示意图

    Figure  2.  Schematic diagram of sample recovery unit

    图  合成的晶态榍石及经61.4 GPa和83.8 GPa压强冲击后榍石的XRD谱

    Figure  3.  XRD patterns of synthetic crystalline, 61.4 GPa and 83.8 GPa pressure shocked titanite

    图  辐照损伤榍石和83.8 GPa冲击榍石XRD图谱

    Figure  4.  XRD patterns of radiation damaged and 83.8 GPa shocked titanite

    图  合成的晶态榍石及经61.4和83.8 GPa压强冲击后的榍石拉曼光谱

    Figure  5.  Raman spectra of synthetic crystalline, 61.4 GPa and 83.8 GPa shocked titanite

    图  合成晶态榍石及经61.4和83.8 GPa冲击后榍石的红外光谱(插图显示Si-O弯曲振动峰和Si-O伸缩振动峰的半峰宽随压力变化情况)

    Figure  6.  Infrared spectra of synthetic crystalline, 61.4 GPa and 83.8 GPa pressure shocked titanite, with insection showing FWHMs of Si-O bending and Si-O stretching vibration as varying with shock pressure

    图  辐照损伤榍石和83.8 GPa冲击榍石拉曼光谱

    Figure  7.  Raman spectra of radiation damaged and 83.8 GPa shocked titanite

    图  辐照损伤榍石和83.8 GPa冲击榍石的红外光谱

    Figure  8.  Infrared spectra of radiation damaged and 83.8 GPa shocked titanite

    表  1  XRD谱结构精修数据

    Table  1.   Rietveld refinement data by XRD patterns

    Pressure/GPa a b c β/(o) V3 wRp Rp C2
    0 7.10 8.77 6.60 113.82 376.37 0.11 0.08 3.79
    61.4 7.06 8.74 6.58 113.81 371.75 0.07 0.06 3.08
    83.8 7.05 8.72 6.56 113.79 368.86 0.04 0.04 1.18
    下载: 导出CSV

    表  2  高压冲击和核辐照对榍石各基团的影响

    Table  2.   Influence of shock and α-decay radiation on structural units of crystalline titanite

    Structural unit Impact of shock α-decay radiation
    [CaO7] polyhedra Decrease in IR intensity by 63% Decrease in IR intensity by 49%
    [TiO6] octahedra Decrease in IR intensity by 61% Decrease in IR intensity by 77%
    [SiO4] tetrahedra Increase in IR band width by 19% Increase in IR band width by 59%
    下载: 导出CSV
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  • 收稿日期:  2018-04-24
  • 修回日期:  2018-05-30

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