Surface crystallization and phase evolution of BaO–SrO–TiO2–SiO2–Al2O3-based glass ceramics
| Autor: | M. Kosmal, Paweł Pichniarczyk, Magdalena Ziąbka, S. J. Skrzypek, Manuela Reben |
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| Rok vydání: | 2017 |
| Předmět: |
Glass-ceramic
Materials science Analytical chemistry Mineralogy 02 engineering and technology Thermal treatment 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Thermal expansion 010406 physical chemistry 0104 chemical sciences law.invention law visual_art visual_art.visual_art_medium Thermal stability Ceramic Physical and Theoretical Chemistry Crystallization 0210 nano-technology Glass transition |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 130:221-228 |
| ISSN: | 1588-2926 1388-6150 |
| Popis: | The goal of the work was to investigate the crystallization process of silica–strontium–barium glass from cathode ray tube (CRT) modified by various TiO2 additions (18–23 mass%). The control thermal treatment of the parent glass with nucleating agent leads to the crystallization. The crystalline phases were determined by X-ray diffractometry. The microstructures of the heat-treated samples were studied by the SEM/EDS technique. Glass ceramic samples were obtained by the heat treatment of CRT glasses with 18 and 23 mass% of TiO2 in a gradient oven. Thermal characteristics such as the glass transition temperature T g, the temperature of non-isothermal crystallization T c, and the thermal stability parameter were determined by DTA/DSC. The linear expansion coefficients of the glasses as a function of temperature were measured. Based on the DTA results, we found that TiO2 was effective in decreasing the crystallization temperature. |
| Databáze: | OpenAIRE |
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