Stability field of cotunnite-type zirconia

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Journal of the American Ceramic Society; (USA)

OSTI ID:6614370

Ontaka, O; Kume, S ^[1]; Ito, E ^[2]

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1. Osaka Univ., Toyonaka (Japan). Coll. of General Education
2. Institute for Study of the Earth's Interior, Okayama Univ., Misasa 682-02 (JP)

The stability field of cotunnite-type ZrO{sub 2} was determined by both syntheses and measurements of electrical conductivity under pressure using a 6--8 anvil-type device. The products synthesized below 1000{degrees}C were ortho II, whereas those above this temperature were monoclinic when quenched. Abrupt discontinuities in conductivity were observed around 1000{degrees}C at 16.5 GPa and around 1050{degrees}C at 18 GPa. It is concluded, therefore, that the phase boundary lies a little above about 1000{degrees}C at pressures from 15 to 20 GPa with slightly positive slope. The result is consistent with that obtained by synthesis experiment.

• OSTI ID: 6614370
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 73:3; ISSN 0002-7820; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
426001 -- Engineering-- Superconducting Devices & Circuits-- (1990-)
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHALCOGENIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
MEASURING METHODS
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
STABILIZED SUPERCONDUCTORS
SUPERCONDUCTORS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES