High pressure polymorphs in ceramics and minerals GeO2 and ZrO2

Shoichi Kume; Osamu Ohtaka; Takamitsu Yamanaka; Alexandra Navrotsky

doi:10.1016/0167-2738(89)90233-6

High pressure polymorphs in ceramics and minerals GeO₂ and ZrO₂

Shoichi Kume, Osamu Ohtaka, Takamitsu Yamanaka, Alexandra Navrotsky

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

3 Scopus citations

Abstract

Two examples of recent studies in high pressure polymorphs of inorganic substances were reported on GeO₂ and ZrO₂. The first one was the measurement of rate of phase transformation from α-quartz to rutile type of GeO₂. The phase change proceeded in two steps: induction period and structural change. From the analysis of measurement it was possible to calculate the activation energy for the phase transformation. The second was the investigation of ZrO₂. Its high pressure phases were difficult to quench, but thermodynamic data were obtained which enabled the calculation of slopes of phase boundaries.

Original language	English (US)
Pages (from-to)	285-287
Number of pages	3
Journal	Solid State Ionics
Volume	32-33
Issue number	PART 1
DOIs	https://doi.org/10.1016/0167-2738(89)90233-6
State	Published - 1989
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1016/0167-2738(89)90233-6

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abstract = "Two examples of recent studies in high pressure polymorphs of inorganic substances were reported on GeO2 and ZrO2. The first one was the measurement of rate of phase transformation from α-quartz to rutile type of GeO2. The phase change proceeded in two steps: induction period and structural change. From the analysis of measurement it was possible to calculate the activation energy for the phase transformation. The second was the investigation of ZrO2. Its high pressure phases were difficult to quench, but thermodynamic data were obtained which enabled the calculation of slopes of phase boundaries.",

author = "Shoichi Kume and Osamu Ohtaka and Takamitsu Yamanaka and Alexandra Navrotsky",

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AU - Kume, Shoichi

AU - Ohtaka, Osamu

AU - Yamanaka, Takamitsu

AU - Navrotsky, Alexandra

PY - 1989

Y1 - 1989

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AB - Two examples of recent studies in high pressure polymorphs of inorganic substances were reported on GeO2 and ZrO2. The first one was the measurement of rate of phase transformation from α-quartz to rutile type of GeO2. The phase change proceeded in two steps: induction period and structural change. From the analysis of measurement it was possible to calculate the activation energy for the phase transformation. The second was the investigation of ZrO2. Its high pressure phases were difficult to quench, but thermodynamic data were obtained which enabled the calculation of slopes of phase boundaries.

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JO - Solid State Ionics

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ER -

High pressure polymorphs in ceramics and minerals GeO₂ and ZrO₂

Abstract

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