Identification of tetragonal and cubic structures of zirconia using synchrotron x-radiation source

Journal Article · Sat Jun 01 00:00:00 EDT 1991 · Journal of Materials Research; (USA)

DOI:https://doi.org/10.1557/JMR.1991.1287· OSTI ID:5491815

Srinivasan, R ^[1]; De Angelis, R J ^[2]; Ice, G ^[3]; Davis, B H ^[1]

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1. Center for Applied Energy Research, University of Kentucky, 3572 Iron Works Pike, Lexington, Kentucky 40511-8433 (USA)
2. Department of Mechanical Engineering, 255 Walter Scott Engineering Center, University of Nebraska at Lincoln, Lincoln, Nebraska 68688-0525 (USA)
3. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (USA)

X-ray diffraction from a synchrotron source was employed in an attempt to identify the crystal structures in zirconia ceramics produced by sol-gel method. The particles of chemically precipitated zirconia, after calcination below 600 {degree}C, are very fine, and have a diffracting particle size in the range of 7--15 nm. As the tetragonal and cubic structures of zirconia have similar lattice parameters, it is difficult to distinguish between the two. The tetragonal structure can be identified only by the characteristic splittings of the Bragg profiles from the c'' index planes. However, these split Bragg peaks from the tetragonal phase in zirconia overlap with one another due to particle size broadening. In order to distinguish between the tetragonal and cubic structures of zirconia, three samples were studied using synchrotron radiation source. The results indicated that a sample containing 13 mol % yttria-stabilized zirconia possessed the cubic structure with {ital a}{sub 0}=0.51420{plus minus}0.00012 nm. A sample containing 6.5 mol % yttria stabilized zirconia was found to consist of a cubic phase with {ital a}{sub 0}=0.51430{plus minus}0.00008 nm. Finally, a sample which was precipitated from a pH 13.5 solution was observed to have the tetragonal structure with {ital a}{sub 0}=0.51441{plus minus}0.00085 nm and {ital c}{sub 0}=0.51902{plus minus}0.00086.

• DOE Contract Number: FG05-85ER45186
• OSTI ID: 5491815
• Journal Information: Journal of Materials Research; (USA), Journal Name: Journal of Materials Research; (USA) Vol. 6:6; ISSN JMREE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
BREMSSTRAHLUNG
CHALCOGENIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
ELECTROMAGNETIC RADIATION
OXIDES
OXYGEN COMPOUNDS
PRECIPITATION
RADIATIONS
SEPARATION PROCESSES
SOL-GEL PROCESS
STABILIZATION
SYNCHROTRON RADIATION
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES