Application of nano-polycrystalline diamond to laser-heated diamond anvil cell experiments

被引：15
|
作者：
Ohfuji, H. [1 ]
Okada, T. [2 ]
Yagi, T. [2 ]
Sumiya, H. [3 ]
Irifune, T. [1 ]
机构：
[1] Ehime Univ, Geodynam Res Ctr, Matsuyama, Ehime 7908577, Japan
[2] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan
[3] Sumitomo Elect Ind Ltd, Elect & Mat R&D Labs, Itami, Hyogo 6640016, Japan
来源：
HIGH PRESSURE RESEARCH | 2010年 / 30卷 / 01期
关键词：
nano-polycrystalline diamond; diamond anvil cell; laser heating; high pressure; high temperature; EQUATION-OF-STATE; SITU X-RAY; HIGH-PRESSURE; MULTIMEGABAR PRESSURE; DIRECT CONVERSION; HIGH-TEMPERATURE; IRON; GRAPHITE; PHASE; GENERATION;
D O I：
10.1080/08957951003600764
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Laser heating in diamond anvil cell (DAC) equipped with nano-polycrystalline diamond (NPD) anvils was tested for the first time using various types of lasers. An NPD-based DAC was found to provide better heating efficiency than a standard DAC with single-crystal anvils, probably due to the order of magnitude lower thermal conductivity of the NPD. We observed high-temperature generation exceeding 5000 and 3500K during laser heating of hcp-Fe sample at pressures of 100 and 170GPa, respectively. The results of the present study demonstrate promising potential of laser-heated nano-polycrystalline DAC for the generation of very high temperature under multi-megabar pressure conditions equivalent to those of the Earth's core.
引用
收藏
页码：142 / 150
页数：9
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