Comparison between incorporation and conventional fabrication techniques of diopside-based glass-ceramics
| Autor: | Wipada Senanon, Kamonpan Pengpat, Tawee Tunkasiri, Ploypailin Yongsiri, Sukum Eitssayeam |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Fabrication
Materials science Oxide Nucleation 02 engineering and technology Activation energy 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound law General Materials Science Calcination Ceramic Crystallization Diopside Mechanical Engineering 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Chemical engineering Mechanics of Materials visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Materials Letters. 249:160-164 |
| ISSN: | 0167-577X |
| Popis: | Crystallization kinetics was widely used for studying nucleation and crystallization mechanism in the materials. In this study, the crystallization kinetics via non-isothermal method of diopside glass-ceramics prepared by incorporation and conventional techniques, have been investigated. The difference between incorporation and conventional method is the use of a simple mixed-oxide technique for producing diopside powder and the powder is then mixed with a glass batch while that of conventional one uses only simple oxides as starting precursors. Therefore, in this work, the diopside powder was calcined at 1200 °C for 4 h and subsequently mixed with SiO2, Al2O3 and ZnO in the 30CaMgSi2O6:40SiO2 + 20Al2O3 + 10ZnO (mol%). For, the conventional method, the simple oxide powders of CaMgSi2O6 (stoichiometric composition) were used instead of the calcined CaMgSi2O6 powders, in similar glass formula. From the heating rate dependence on crystallization temperature, the activation energy (Ea) of crystallization and Avrami parameter (n) were calculated by Kissinger and Ozawa equation, respectively. It was found that these two methods show similar crystallization mechanism but the incorporation method tends to crystallize easier than that of conventional one. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect