Melt size-dependent physical property variation is examined in a multicomponent GeSe2-As2Se3-PbSe chalcogenide glass developed for gradient refractive index applications. The impact of melting conditions on small (40 g) prototype laboratory-scale melts extended to commercially relevant melt sizes (1.325 kg) have been studied and the role of thermal history variation on physical and optical property evolution in parent glass, the glass' crystallization behavior and post heat-treated glass ceramics, is quantified. As-melted glass morphology, optical homogeneity and heat treatment-induced microstructure following a fixed, two-step nucleation and growth protocol exhibit marked variation with melt size. These attributes are shown to impact crystallization behavior (growth rates, resulting crystalline phase formation) and induced effective refractive index change, neff, in the resulting optical nanocomposite. The magnitude of these changes is discussed based on thermal history related melt conditions.
A. Yadav and A. Buff and M. Kang and L. Sisken and C. Smith (Lonergan) and J. Lonergan and C. Blanco and M. Antia and M. Driggers and A. Kirk and C. Rivero-Baleine and T. Mayer and A. Swisher and A. Pogrebnyakov and A. R. Hilton and G. Whaley, "Melt Property Variation In GeSe2-As2Se3-PbSe Glass Ceramics For Infrared Gradient Refractive Index (GRIN) Applications," International Journal of Applied Glass Science, vol. 10, no. 1, pp. 27 - 40, Wiley, Jan 2019.
The definitive version is available at https://doi.org/10.1111/ijag.12618
Materials Science and Engineering
Keywords and Phrases
chalcogenide glasses; crystallization; glass-ceramics; gradient refractive index; infrared; liquid-liquid phase separation
International Standard Serial Number (ISSN)
Article - Journal
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01 Jan 2019