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Transparent ceramics by full crystallization from glass : application to strontium aluminosilicates

Abstract : Transparent polycrystalline ceramics elaborated by full crystallization from glass are an emerging class of photonicquality materials competing with single crystal technology, especially for optical applications. This approach provides considerable advantages over single crystals and polycrystalline sintered ceramics represented by cost effectiveness, large scale production, wide range of accessible chemical compositions, easy shaping and high doping level hosting structure. In this work, we show the preparation of transparent cubic Sr3Al2O6 and Sr3Ga2O6 polycrystalline ceramics by full crystallization from the parent strontium aluminate (75SrO-25Al2O3) and strontium gallate (75SrO-25Ga2O3) glasses elaborated by aerodynamic levitation coupled to laser heating system. The transparency of the obtained Sr3Al2O6 ceramics is explained by their optical isotropy, thin grain boundaries and highly dense (non-porous) microstructure. We also show a series of novel Sr1+x/2Al2+xSi2-xO8 (0
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Submitted on : Saturday, March 7, 2015 - 12:44:21 AM
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  • HAL Id : tel-01127188, version 1



Kholoud Al Saghir. Transparent ceramics by full crystallization from glass : application to strontium aluminosilicates. Other. Université d'Orléans, 2014. English. ⟨NNT : 2014ORLE2023⟩. ⟨tel-01127188⟩



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