Effects of pre-heated pyrophyllite gaskets on high-pressure generation in the Kawai-type multi-anvil experiments

被引：9

作者：

Zhai, Shuangmeng ^{[1
,2
,3
]}

Ito, Eiji ^{[3
]}

Yoneda, Akira ^{[3
]}

机构：

[1] Minist Educ Res, Key Lab Orogen Belts & Crustal Evolut, Beijing, Peoples R China

[2] Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China

[3] Okayama Univ, Inst Study Earths Interior, Misasa, Tottori 68202, Japan

来源：

HIGH PRESSURE RESEARCH | 2008年 / 28卷 / 03期

关键词：

pyrophyllite gasket; pre-heating; pressure generation;

D O I：

10.1080/08957950802454050

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Pyrophyllite gaskets heated up to 900 degrees C for 1 h and raw gaskets (without heating treatment) were characterized by X-ray diffraction and Raman spectroscopy. These gaskets were used in multi-anvil high-pressure experiments to investigate the effect of pre-heating on pressure generation in Kawai-type apparatus. The results show that the gaskets heated at low temperatures (200-500 degrees C) have no change in structure and those heated at higher temperatures (600-900 degrees C) dehydroxylate gradually. No structural OH is observed in 900 degrees C pre-heated gasket from Raman spectroscopy indicating a complete dehydroxylation. The low temperature (200-500 degrees C) pre-heated gasket causes a limited effect on pressure generation, and the high-temperature (600-900 degrees C) pre-heated gasket has a relatively large negative effect on pressure generation.

引用

页码：265 / 271

页数：7

共 45 条

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