冲击压缩下金属的电导率测量

毕延; 谭华; 经福谦; 赵敏光

doi:10.11858/gywlxb.2003.01.001

冲击压缩下金属的电导率测量

doi: 10.11858/gywlxb.2003.01.001

毕延^1,,
谭华¹,
经福谦^1,2,
赵敏光³

1.
中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室，四川绵阳 621900；
2.
西南交通大学物理研究所，四川成都 610031；
3.
四川师范大学固体物理研究所，四川成都 610068

详细信息

通讯作者:
毕延

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出版历程
- 收稿日期: 2002-07-25
- 修回日期: 2002-09-23
- 发布日期: 2003-03-05

Electrical Conductivity Measurements for Metals under Shock Compression

1.
Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, Mianyang 621900, China;
2.
Institute of Physics, Southwest Jiaotong University, Chengdu 610031, China;
3.
Institute of Solid Physics, Sichuan Normal University, Chengdu 610068, China

More Information

Corresponding author: BI Yan

摘要

摘要: 探索了一种在兆巴压力冲击压缩下测量金属电导率的新方法四电极垂向引线法，并用刻槽单晶蓝宝石作绝缘腔体，以消除分流效应对测量结果的影响。用二级轻气炮作为加载手段，测量了铁在终态平衡压力为101～208 GPa压力区间内的电导率（电导率从1.45106 S/m变化到7.65105 S/m）。将测量铁电导率的压力范围扩展到了200 GPa以上。实验结果表明，关于金属电导率的Bloch-Grneisen公式在高达200 GPa冲击压力下仍然有效（对于-铁）。
- 冲击压缩 /
- 铁 /
- 电导率 /
- Bloch-Grneisen金属电导率公式
Abstract: A novel method using four electrodes perpendicular to shock front was proposed to measure the electrical conductivity of metals under shock compression up to megabar pressures. Using the drilled sapphire disk as insulator can eliminate the shunting effect, which will result in a higher conductivity data. The electrical conductivities of iron under shock compression in the final equilibrium pressures ranging from 101 to 208 GPa were obtained by using the two-stage light gas gun techniques. The measured conductivity of iron varies from 1.45106 S/m at 101 GPa and 2 010 K, to 7.65 105 S/m at 208 GPa and 5 220 K, which first extend the electrical conductivity measurements of iron to pressures beyond 200 GPa. The experimental results indicate that the Bloch-Grneisen equation describing the high-pressure electrical conductivity of metals still holds true up to 200 GPa for -Fe (hcp structure).
- shock compression /
- iron /
- electrical conductivity /
- Bloch-Grneisen formula

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参考文献(18)

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