Crystal structures of two orthorhombic zirconias

Journal Article · Sun Sep 01 00:00:00 EDT 1991 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1991.tb08307.x· OSTI ID:5845608

Howard, C J ^[1]; Kisi, E H ^[2]; Ohtaka, O ^[3]

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1. Australian Nuclear Science and Technology Organization, Menai, New South Wales 2234 (AU)
2. Division of Science and Technology, Griffith Univ., Nathan, Queensland 4111 (AU)
3. Osaka Univ. (Japan)

The crystal structures of orthorhombic zirconias formed by cooling magnesia-partially-stabilized zirconia (Mg-PSZ) (space group Pbc2{sub 1}) and by quenching zirconia powder from 600{degrees} C and 6 GPa (space group Pbca) are compared and contrasted. It is demonstrated that the two structures are easily distinguished by the neutron powder diffraction techniques used to establish them. The occurrence of two distinct phases is hence proved. Structural relationships between these two phases and also with the in situ high-pressure structure proposed from x-ray diffraction (XRD) are discussed. In this paper the three structures are virtually indistinguishable by XRD and so the structure of the high-pressure form in situ is considered to remain unknown.

• OSTI ID: 5845608
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 74:9; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL LATTICES
NEUTRON DIFFRACTION
X-RAY DIFFRACTION
ZIRCONIUM OXIDES
CRYSTAL STRUCTURE
COOLING
HIGH PRESSURE
ORTHORHOMBIC LATTICES
POWDERS
SOLID SOLUTIONS
CHALCOGENIDES
COHERENT SCATTERING
DIFFRACTION
DISPERSIONS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SOLUTIONS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
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