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Glass formation in the Sb2O3-ZnBr2 binary system |
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| Authors: | Messaoud Legouera Marcel Poulain |
| Institution: | a Université de Biskra, BP: 145, RP-Biskra 07000, Algeria b Laboratory of inorganic materials, Institute of Inorganic Chemistry of AS CR and ICTPrague, 250 68 Rez, Czech Republic c Laboratoire Matériaux Photoniques, Université de Rennes I, CEMA, Campus Beaulieu, F-35042 Rennes, France |
| Abstract: | Glass formation has been investigated in the Sb2O3-ZnBr2 binary system. Vitreous samples have been obtained for batches containing 20-90 mol% Sb2O3. Chemical analysis shows that bromine concentration is smaller than expected and real compositions belong to the Sb2O3-ZnBr2-ZnO ternary system. However, the discrepancy between nominal and analyzed compositions is fair for Sb2O3 content larger than 50 mol%. Optical transmission lies between 400 nm and 7 μm and refractive index ranges from 2.0 to 2.1. Glass transition occurs around 300 °C, and crystallization exotherm does not appear in the differential scanning calorimetry scan at 10 K s−1 for samples containing 50-60 mol% Sb2O3. Thermal expansion varies between 120 and 220×10−7 K−1 as antimony content decreases. Microhardness is close to 200 kg/mm2. These glasses have low phonon energy and make potential materials for infrared transmission and active fibers. |
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