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  • 2024 Spriggs Phase Equilibria Award of ACerS

The ACerS's Spriggs Phase Equilibria Award 2024 goes to...

 ... the MSIT members Dr. Olga Fabrichnaya and Dr. Mariia Ilatovskaia.

Olga, Maria and their co-author André Treichel received the award for their scientific paper “The MgO-TiO2-SiO2 System: Experiments and thermodynamic assessment” published in the Journal of the American Ceramic Society; Vol. 106, Issue 12; 2023; 7704-7727.

This award is given to the authors who, in the judgment of the award committee, made the most valuable contribution to phase stability relationships in ceramic-based systems literature during the previous year. Upon the recommendation of the selection committee, the ACerS Board of Directors unanimously approved your selection. Congratulations to all of you on receiving this important and well-deserved honor!

Recognition of this achievement will be given at the ACerS Honors and Awards Banquet at our 126th Annual Meeting on Monday, October 7, 2024, in Pittsburgh, Pennsylvania, USA.

Many congratulations!


Phase relations in the MgO–TiO2–SiO2 system have been investigated in air over a wide temperature range using the equilibration method. X-ray powder diffraction, scanning electron microscopy combined with wave length X-ray spectroscopy (SEM/EPMA), and differential thermal analysis (DTA) have been used for sample characterization. Based on the obtained experimental results, isothermal sections of the system at 1523, 1673, and 1773 K have been established. The solid-state invariant reaction MgTi2O5 + T-SiO2⇋P-MgSiO3 + TiO2 has been detected at 1625 ± 8 K by step-wise heat treatment. A partial liquidus projection has been suggested, and the temperatures and compositions of three eutectic invariant reactions have been experimentally measured by DTA and ex-situ analysis of the sample microstructures after melting using SEM/EPMA. Considering the newly obtained experimental data, thermodynamic parameters describing the system have been thermodynamically evaluated within the CALPHAD approach.