Enthalpies of formation in the scandia-zirconia system

Grosso, Robson L.; Muccillo, Eliana N. S.; Castro, Ricardo H. R.

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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Enthalpies of formation in the scandia-zirconia system

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Author(s):	Grosso, Robson L. ; Muccillo, Eliana N. S. ; Castro, Ricardo H. R. Total Authors: 3
Document type:	Journal article
Source:	Journal of the American Ceramic Society; v. 100, n. 9, p. 4270-4275, SEP 2017.
Web of Science Citations:	3
Abstract
The scandia-zirconia (ScZ) solid solutions have been attracting attention from the communities interested in solid-oxide fuel cells because they possess the highest ionic conductivity among zirconia-based materials. However, this system shows a relatively large number of polymorphs with lack of thermodynamic data to enable comprehensive phase control for property optimization. In this work, the enthalpy of formation of the ScZ system within the range 0-20mol% Sc2O3 is determined by combining the surface energy values with enthalpy of drop solution data obtained from high-temperature oxide melt solution calorimetry. The heats of formation, a key data for understanding phase stability, for five polymorphs: monoclinic (m), tetragonal (t), cubic (c), and rhombohedral ( and ) are reported for the first time. (AU)

FAPESP's process:	14/24022-6 - Thermodynamic study of the phase stability of zirconia-scandia nanoparticles
Grantee:	Robson Lopes Grosso
Support Opportunities:	Scholarships abroad - Research Internship - Doctorate

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