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

Shuangmeng Zhai; Eiji Ito; Akira Yoneda

doi:10.1080/08957950802454050

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

Shuangmeng Zhai, Eiji Ito, Akira Yoneda

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Pyrophyllite gaskets heated up to 900°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°C) have no change in structure and those heated at higher temperatures (600-900°C) dehydroxylate gradually. No structural OH is observed in 900°C pre-heated gasket from Raman spectroscopy indicating a complete dehydroxylation. The low temperature (200-500°C) pre-heated gasket causes a limited effect on pressure generation, and the high-temperature (600-900°C) pre-heated gasket has a relatively large negative effect on pressure generation.

Original language	English
Pages (from-to)	265-271
Number of pages	7
Journal	High Pressure Research
Volume	28
Issue number	3
DOIs	https://doi.org/10.1080/08957950802454050
Publication status	Published - Sept 2008

Keywords

Pre-heating
Pressure generation
Pyrophyllite gasket

ASJC Scopus subject areas

Condensed Matter Physics

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10.1080/08957950802454050

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

abstract = "Pyrophyllite gaskets heated up to 900°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°C) have no change in structure and those heated at higher temperatures (600-900°C) dehydroxylate gradually. No structural OH is observed in 900°C pre-heated gasket from Raman spectroscopy indicating a complete dehydroxylation. The low temperature (200-500°C) pre-heated gasket causes a limited effect on pressure generation, and the high-temperature (600-900°C) pre-heated gasket has a relatively large negative effect on pressure generation.",

keywords = "Pre-heating, Pressure generation, Pyrophyllite gasket",

author = "Shuangmeng Zhai and Eiji Ito and Akira Yoneda",

note = "Funding Information: The authors thank M. Kanzaki for Raman spectroscopic analyses, T. Matsuzaki for technical support, and D. Yamazaki and T. Katsura for valuable discussions. This work was financially supported by the program of “Centre of Excellence (COE) for the 21st Century in Japan”, and National Natural Science Foundation of China (grant no. 40402006). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2008",

month = sep,

doi = "10.1080/08957950802454050",

language = "English",

volume = "28",

pages = "265--271",

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AU - Zhai, Shuangmeng

AU - Ito, Eiji

AU - Yoneda, Akira

N1 - Funding Information: The authors thank M. Kanzaki for Raman spectroscopic analyses, T. Matsuzaki for technical support, and D. Yamazaki and T. Katsura for valuable discussions. This work was financially supported by the program of “Centre of Excellence (COE) for the 21st Century in Japan”, and National Natural Science Foundation of China (grant no. 40402006). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2008/9

Y1 - 2008/9

N2 - Pyrophyllite gaskets heated up to 900°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°C) have no change in structure and those heated at higher temperatures (600-900°C) dehydroxylate gradually. No structural OH is observed in 900°C pre-heated gasket from Raman spectroscopy indicating a complete dehydroxylation. The low temperature (200-500°C) pre-heated gasket causes a limited effect on pressure generation, and the high-temperature (600-900°C) pre-heated gasket has a relatively large negative effect on pressure generation.

AB - Pyrophyllite gaskets heated up to 900°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°C) have no change in structure and those heated at higher temperatures (600-900°C) dehydroxylate gradually. No structural OH is observed in 900°C pre-heated gasket from Raman spectroscopy indicating a complete dehydroxylation. The low temperature (200-500°C) pre-heated gasket causes a limited effect on pressure generation, and the high-temperature (600-900°C) pre-heated gasket has a relatively large negative effect on pressure generation.

KW - Pre-heating

KW - Pressure generation

KW - Pyrophyllite gasket

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

Abstract

Keywords

ASJC Scopus subject areas

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