Phase stability in scandia-zirconia nanocrystals
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Journal of the American Ceramic Society
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Scandia-zirconia system has great technological interest as it has the highest ionic
conductivity among doped zirconia ceramics. However, polymorphism is the most
important limiting factor for application of this material. Considering that there is
a strong grain size dependence on phase transitions in this class of materials,
mapping out the stable polymorph as a function of grain size and composition
may lead to more efficient compositional design. In this article, the phase stability
of zirconia-scandia nanocrystals was investigated based on experimental thermodynamic
data. Exploiting recent advances in microcalorimetry, reliable surface
energy data for five polymorphs of scandia-zirconia system: monoclinic, tetragonal,
cubic, rhombohedral b and c are reported for the first time. Combining surface
energy values with bulk enthalpy data obtained from oxide melt drop
solution calorimetry allowed us to create a predictive phase stability diagram that
shows the stable zirconia polymorph as a function of composition and grain size
of the specimen within the range of 0-20 mol% scandia.
Como referenciar
GROSSO, ROBSON L.; MUCCILLO, ELIANA N.S.; CASTRO, RICARDO H.R. Phase stability in scandia-zirconia nanocrystals. Journal of the American Ceramic Society, v. 100, n. 5, p. 2199-2208, 2017. DOI: 10.1111/jace.14710. Disponível em: http://repositorio.ipen.br/handle/123456789/27745. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.