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Analysis of viscosity data in As2Se3, Se and Se95Te5 chalcogenide melts using the pressure assisted melt filling technique
Authors: Barták Jaroslav | Košťál Petr | Valdés Mitchell Diego Alejandro | Málek Jiří | Wieduwilt Torsten | Kobelke Jens | Schmidt Markus A.
Year: 2019
Type of publication: článek v odborném periodiku
Name of source: Journal of Non-Crystalline Solids
Publisher name: Elsevier Science BV
Place: Amsterdam
Page from-to: 100-108
Titles:
Language Name Abstract Keywords
cze Analýza viskozitních dat tavenin As2Se3, Se a Se95Te5 získaných technikou vytlačování taveniny Viskozity v oblasti taveniny byly stanoveny pro složení As2Se3, Se a Se95Te5 pomocí techniky vytlačování taveniny úzkou kapilárou za využití tlaku. V případě tavenin As2Se3 a Se byla tato technika otestována a verifikována. Nová viskozitní data byla poté získána pro taveninu Se95Te5. PAMFT; viskozita; chalkogenidová tavenina
eng Analysis of viscosity data in As2Se3, Se and Se95Te5 chalcogenide melts using the pressure assisted melt filling technique The pressure-assisted melt filling technique (PAMFT) is promising approach for integrating new materials such as glasses or semiconductor into fiber, while only a small amount of starting material (< 0.1 mg) is actually required for the implementation of such hybrid optical fibers of length of several centimeters. PAMFT has also the capability to provide viscosity data of glass-forming melts determined during the filling process. The main advantage of this technique - the demand of only small amounts of material (< 0.1 mg) is accompanied by the fact that the molten material is encapsulated inside a silica capillary under high pressure. Therefore, PAMFT represents a promising method for measuring highly volatile and corrosive materials, such as chalcogenides. Here we present a detailed analysis on applying PAMFT for viscosity measurement of chosen chalcogenide systems with respect to experimental conditions (applied pressure and capillary diameter) and physical materials properties (surface tension and contact angle towards silica glass). For our study, we chose two well-known chalcogenide materials (Se and As2Se3) as representatives of non-wetting and wetting liquids towards silica glass. The melt viscosities were measured in the range of 0.01-25 Pa.s showing that PAMFT is a suitable method for the determination of viscosity of chalcogenide melts providing reliable data even if in the situation the influence of surface tension and contact angle is neglected. We also present new viscosity data on Se95Te5 chalcogenide melt obtained using PAMFT. Pressure-assisted melt filling technique (PAMFT); Viscosity; Chalcogenide melt

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