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

Shuangmeng Zhai, Eiji Ito, Akira Yoneda

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3 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 languageEnglish
Pages (from-to)265-271
Number of pages7
JournalHigh Pressure Research
Volume28
Issue number3
DOIs
Publication statusPublished - Sep 1 2008

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Keywords

  • Pre-heating
  • Pressure generation
  • Pyrophyllite gasket

ASJC Scopus subject areas

  • Condensed Matter Physics

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