A new thermal analysis technique for detecting the melting of silicates under high pressure: Application to the melting of pyrope up to 9 GPa

Tatsuya Sumita, Akira Yoneda

Research output: Contribution to journalArticle

Abstract

A new thermal analysis for the Kawai-type high-pressure apparatus has been developed for determining the melting temperatures of silicates. The thermal analysis system consists of a heating system and a temperature measurement system: the former enables us to control heating and cooling accurately through a personal computer, and the latter measures the highest and lowest temperatures of the sample precisely with two independent thermocouples. The signal of melting is detected by monitoring dΔT/dt, where ΔT is the temperature difference across the sample, and t is time. The performance of this thermal analysis method has been tested by re-determining the melting curve of pyrope up to 9 GPa. The resulting melting curve agrees well with previous results determined by quenching experiments. Further, the proposed method improves the efficiency of determining the melting curve-it has taken only three runs to construct the curve, while previous quenching experiments required thirty runs to yield similar results.

Original languageEnglish
Pages (from-to)473-481
Number of pages9
JournalHigh Temperatures - High Pressures
Volume34
Issue number4
DOIs
Publication statusPublished - 2002
Externally publishedYes

Fingerprint

Silicates
Thermoanalysis
silicates
thermal analysis
Melting
melting
Quenching
curves
Heating
quenching
Thermocouples
heating
Temperature measurement
Personal computers
Melting point
personal computers
thermocouples
Experiments
temperature measurement
Cooling

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Mechanics of Materials
  • Computational Mechanics
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

Cite this

A new thermal analysis technique for detecting the melting of silicates under high pressure : Application to the melting of pyrope up to 9 GPa. / Sumita, Tatsuya; Yoneda, Akira.

In: High Temperatures - High Pressures, Vol. 34, No. 4, 2002, p. 473-481.

Research output: Contribution to journalArticle

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