Conference
The influence of mechanical activation parameters as a function of producing a Magnesium aluminate (MgAl2O4) spinel
| العنوان: | The influence of mechanical activation parameters as a function of producing a Magnesium aluminate (MgAl2O4) spinel |
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| المؤلفون: | Peleš Tadić, Adriana, Živojinović, Jelena, Marković, Smilja, Tadić, N., Lević, S. M., Pavlović, Vladimir B., Filipović, Suzana, Obradović, Nina |
| المصدر: | Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XII New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 18-20. September 2024 |
| بيانات النشر: | Serbian Ceramic Society |
| سنة النشر: | 2024 |
| المجموعة: | DAIS repository (Digital Archive of the Publications of the Serbian Academy of Sciences and Arts - SASA) / Дигитални архив издања САНУ |
| مصطلحات موضوعية: | mechanical activation, MgAl2O4, magnesium aluminate spinel |
| الوصف: | Magnesium aluminate spinel (MAS) has excellent mechanical, chemical, thermal (high melting point, higer than 2100 °C) and optical properties. Also it has a low dielectric constant (εr~8). Based on those properties, MgAl2O4 has found a significant application in refractory ceramics, radomes, transparent armor, optically transparent windows, integrated electronic devices, etc. In this research, MgO was calcined at 1000oC for an hour, in order to avoid presence of hydroxide or carbonate. MgO and Al2O3 powders were mixed in a one-to-one molar ratio and mechanically activated for 15, 30, and 60 minute and pressed in the tablets, under the pressure of 0.5 t. The pressed powders were heated up to 1300 oC and held for 1 h for the reaction. After that, obtained spinel powders were sintered at 1450 oC for 2 h. Both sintered and non-sintered samples were investigated by XRD, SEM, PSA and Raman spectra. All results are in accordance with our previous results, and the pure dense spinel phase is obtained. XRD shows that mechanically nonactivated specimen as well as activated sintered specimens show the pure MgAl2O4 phase after sintering at 1450°C. Raman spectra revealed that mechanical activation leads to an increase in the degree of the exchange between Mg and Al cations, due to the introduction of defects during the milling process. The study shows that a precise setting of mechanical activation parameters enhances sinterability, phase formation and microstructure homogeneity of reaction sintered MAS ceramics. |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| Relation: | info:eu-repo/grantAgreement/MESTD/inst-2020/200175/RS//; https://dais.sanu.ac.rs/123456789/16794; https://hdl.handle.net/21.15107/rcub_dais_16794 |
| الاتاحة: | https://dais.sanu.ac.rs/123456789/16794 http://dais.sanu.ac.rs/bitstream/id/66803/Peles-Tadic-ACA-XII-5.pdf https://hdl.handle.net/21.15107/rcub_dais_16794 |
| Rights: | openAccess ; https://creativecommons.org/licenses/by/4.0/ ; BY |
| رقم الانضمام: | edsbas.BE69C78A |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |