BaO effect on the thermal properties of the phosphate glasses inside the Na2O–SrO–TiO2–B2O3–P2O5 system

• Published in: Journal of non-crystalline solids Vol. 405; pp. 33 - 38
• Main Authors: Sinouh, H., Bih, L., El Bouari, A., Azrour, M., Manoun, B., Lazor, P.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier B.V 01-12-2014; Elsevier
• Subjects: Cold working, work hardening; annealing, quenching, tempering, recovery, and recrystallization; textures; Computer networks; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Crystallization; Density; Diffraction; Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Geovetenskap med inriktning mot mineralogi, petrologi och tektonik; Glass; Glass transitions; Glass-ceramics; Glasses; Glasses (including metallic glasses); Growth from solid phases (including multiphase diffusion and recrystallization); Heat treatment; Materials science; Methods of crystal growth; physics of crystal growth; Networks; Physics; Specific materials; Specific phase transitions; Strontium-titano-phosphate; Structure; Thermal properties; Treatment of materials and its effects on microstructure and properties; Strontium-titano-phosphate; Glasses; Glass-ceramics; Structure; Crystallization; Phosphates; Differential scanning calorimetry; Molar volume; Thermogravimetry; Glass; XRD; Microhardness; Glass transition temperature; Heat treatments; Quenching; Thermal properties; Ferroelectric materials; Temperature effects; Kinetics; Activation energy
• ISSN: 0022-3093; 1873-4812; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2014.08.031

The glasses in the Na2O–SrO–BaO–TiO2–B2O3–P2O5 system were prepared by the conventional quenching route. In the present work, we studied the effect of BaSr substitution on some physical parameters such as density, molar volume, micro-hardness, glass transition temperature (Tg), and crystallization temperature (Tc) of series of glasses with the following composition 33.33Na2O–(10−x)SrO−xBaO–10TiO2–30B2O3–16.67P2O5. The crystallization of the glasses by heat-treatments is performed and X-ray diffraction (XRD) showed the formation of a ferroelectric phase SrTiO3 and Na4Ba2(PO3)6 in their network. The kinetic of the crystallization is carried out by using DSC technique, and the activation energy and the Avrami parameter (n) are determined.
•Glasses in the Na2O–SrO–BaO–TiO2–B2O3–P2O5 system were prepared by the conventional quenching method.•Thermal and microhardness properties were carried out.•Crystallization of the glasses by heat treatment at different temperatures is realized.•Crystallization kinetic and the mechanism of the crystallization are discussed.