Abstract
Glass formation region, thermal stability and chemical durability have been determined in the four component glassy YF3-PbFrCdF2-AIF3 (YPCA) system. The notable features of these glasses are thermal stability at 110°C, IR transmission of ∼ 80% with long wavelength cut-off at 9.5 μm and excellent chemical stability. These features are superior to zirconium fluoride glasses conventionally used as infrared materials. An important characteristic of the glass, i.e. water durability has been studied using three different techniques, namely static dissolution test, monitoring water absorption peak in the IR spectrum with dipping time and by analysis of the leached solution. The results from all the three methods complement each other and the glasses show excellent resistance to water attack at ambient temperature. YPCA glasses, therefore, appear as promising candidates for infrared related applications.
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