高压物理学报

冲击压缩下金属的电导率测量

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毕延 ¹ , 谭华 ¹ , 经福谦 ¹^,² , 赵敏光 ³

高压物理学报 | 2003,17(1): 1-7

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高压物理学报 | 2003 , 17 (1) : 1 -7

冲击压缩下金属的电导率测量

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毕延¹, 谭华¹, 经福谦¹^,², 赵敏光³

作者信息

^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

作者简介:

毕延（1966—），男，博士.

Electrical Conductivity Measurements for Metals under Shock Compression

Yan BI¹, Hua TAN¹, Fu-Qian JING¹^,², Min-Guang ZHAO³

Affiliations

^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

出版时间: 2003-03-05

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摘要

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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1.45×10⁶ S/m变化到7.65×10⁵ 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-Grüneisen公式在高达200 GPa冲击压力下仍然有效（对于ε-铁）。

关键词

冲击压缩 / 铁 / 电导率 / Bloch-Grüneisen金属电导率公式

Abstract

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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 1.45×10⁶ S/m at 101 GPa and 2010 K, to 7.65×10⁵ S/m at 208 GPa and 5220 K, which first extend the electrical conductivity measurements of iron to pressures beyond 200 GPa. The experimental results indicate that the Bloch-Grüneisen equation describing the high-pressure electrical conductivity of metals still holds true up to 200 GPa for ε-Fe (hcp structure).

Key words

shock compression / iron / electrical conductivity / Bloch-Grüneisen formula

引用本文

毕延, 谭华, 经福谦, 赵敏光. 冲击压缩下金属的电导率测量. 高压物理学报, 2003 , 17 (1) : 1 -7 .

Yan BI, Hua TAN, Fu-Qian JING, Min-Guang ZHAO. Electrical Conductivity Measurements for Metals under Shock Compression[J]. Chinese Journal of High Pressure Physics, 2003 , 17 (1) : 1 -7 .

基金

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国家自然科学基金重点项目(10032040)
中国工程物理研究院科学技术基金(970105)
中国工程物理研究院院外基金(99010103)

参考文献

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参考文献引证文献

排序方式：

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2003年第17卷第1期

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接收时间：2002-07-25
首发时间：2026-10-31
出版时间：2003-03-05

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出版历史

收稿日期：2002-07-25
修回日期：2002-09-23

基金

国家自然科学基金重点项目(10032040)

中国工程物理研究院科学技术基金(970105)

中国工程物理研究院院外基金(99010103)

作者信息

^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

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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