Dear Colleagues,

When glasses are heated to the glass transition region, atomic mobility increases, leading to the formation of crystalline nuclei embedded in the amorphous matrix. Depending on the thermal treatment, these nuclei can grow and give rise to glass-ceramic materials above crystallization temperature. When subjected to pressures of the GPa order, glasses can be permanently densified and exhibit structural changes that remain after pressure is released, due to their structural freedom. High pressure and/or high-pressure/high-temperature processing of glasses can induce polyamorphism and affect the nucleation and growth of crystalline phases through changes induced in bond angles, interatomic distances, coordination number, phase formation, and change in mechanical, thermal, electrical, and optical properties. This Special Issue aims to elucidate the mechanisms of densification of vitreous systems and their effects on macroscopic properties. For this, works on glass and glass-ceramic systems at high pressure are encouraged. Examples of approaches include but are not limited to the (A) characterization of amorphous phases as a function of pressure; (B) formation of glass-ceramics; (C) characterization and experiments in high-volume systems; (D) characterization and experiments in small-volume systems; (E) use of synchrotron radiation for studies; (F) PDF, EXAFS, XRD, XRS, Raman, IR; (G) calculations and modeling; (H) theory versus experiments; (I) mechanical, thermal, electrical, magnetic, and optical properties as functions of pressure; (J) glass, glass-ceramics, and minerals; (K) instrumentation in high pressure to apply in glass-ceramics; (L) thermodynamic models.

Dr. Silvio Buchner
Guest Editor

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• glass
• glass-ceramic
• high pressure
• phase transition
• structure
• crystallization kinetics
• theory and applications
• glass transition
• amorphous phase
• characterization and properties