Journal of Materials Science

, Volume 35, Issue 22, pp 5563–5567

X-ray diffraction study of compositionally homogeneous, nanocrystalline yttria-doped zirconia powders

  • D. G. Lamas
  • N. E. Walsöe De Reca
Article

DOI: 10.1023/A:1004896727413

Cite this article as:
Lamas, D.G. & Walsöe De Reca, N.E. Journal of Materials Science (2000) 35: 5563. doi:10.1023/A:1004896727413

Abstract

The crystal structure of compositionally homogeneous, nanocrystalline ZrO2 - X mol% Y2O3 (X = 2.8, 4, 5, 6, 7, 8, 9, 10, 11, and 12) powders synthesized by a nitrate-citrate gel-combustion process has been studied by X-ray diffraction. By applying the Rietveld method, it was found that all the powders presented the tetragonal phase (P42/nmc space group). The axial ratio c/af decreased with increasing Y2O3 content and became almost unity at 9 mol% Y2O3. However, powders in the compositional range of ZrO2 - 9 to 12 mol% Y2O3 exhibited the oxygen atoms displaced from their ideal sites of the cubic phase along the c axis, which is known as the t′′-form of the tetragonal phase. A conjunct analysis of crystallite size and microstrain of all the powders is also presented.

Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • D. G. Lamas
    • 1
  • N. E. Walsöe De Reca
    • 2
  1. 1.PRINSO (Programa de Investigaciones en Sólidos)CITEFA-CONICET, ZufriateguiPcia. de Buenos AiresArgentina
  2. 2.PRINSO (Programa de Investigaciones en Sólidos)CITEFA-CONICET, ZufriateguiPcia. de Buenos AiresArgentina

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