Abstract
The thermodynamics of the ZrO2–SrO system is of interest for the optimization of synthesis and applications of functional materials and high-temperature structural ceramics. Earlier data on phase relationships and thermodynamic properties of the system are unfortunately scattered and inconsistent. In this study, the compounds Srn+1ZrnO3n+1 (n = 3, 2, and 1) were prepared by solid-state reaction. Their heat capacities from 573 to 1273 K were measured by differential scanning calorimetry and their enthalpies of formation from component oxides at 298 K were determined by high-temperature oxide melt solution calorimetry. The CALPHAD method was used to assess the ZrO2–SrO system, using both available literature data and our new measurements. A self-consistent thermodynamic database and the calculated phase diagram of the ZrO2–SrO system are provided. This work is a prerequisite for accurate predictions of the relationships among the composition, temperature, and microstructure of complex functional and structural materials containing ZrO2 and SrO.
Original language | English (US) |
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Pages (from-to) | 1425-1435 |
Number of pages | 11 |
Journal | Journal of the American Ceramic Society |
Volume | 103 |
Issue number | 2 |
DOIs | |
State | Published - Feb 1 2020 |
Externally published | Yes |
Keywords
- CALPHAD
- Ruddlesden-Popper compounds
- ZrO–SrO
- calorimetry
- thermodynamics
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry