Study of crystallization kinetics of Teo2-Na2O-Mgo glass using Ozawa method: influence of europium
The study of the crystallization kinetics of rare-earth doped glass stimulated much interest especially for crystallization process. In this work transparent Eu2O3 doped glasses with composition TeO2 - Na2O - MgO were prepared using conventional melt-quenching technique. The amorphous nature of glas...
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| Pengarang-pengarang Utama: | , , , , |
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| Format: | Book Section |
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Trans Tech Publications
2012
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| Capaian Atas Talian: | http://eprints.utm.my/36034/ http://eprints.utm.my/36034/ http://eprints.utm.my/36034/ |
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| Ringkasan: | The study of the crystallization kinetics of rare-earth doped glass stimulated much interest especially for crystallization process. In this work transparent Eu2O3 doped glasses with composition TeO2 - Na2O - MgO were prepared using conventional melt-quenching technique. The amorphous nature of glass was confirmed using X-ray diffraction method. The influence of Eu3+ content on the crystallization kinetics of the glass such as activation energy (E-a) was thoroughly evaluated under non-isothermal conditions using DTA. The crystallization kinetic at different heating rate from 5 degrees C min(-1) to 25 degrees C min(-1) at different crystallization temperature (T-p) were examined and verified using Ozawa method. The result showed that the activation energy (E-a) was decreased with the increasing of the dopant concentration from 319.8 eV to 93.5 eV. |
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