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Crystallization of ZBLAN Glass
Author(s) -
Aasland Siv,
Grande Tor
Publication year - 1996
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1996.tb08961.x
Subject(s) - zblan , crystallization , liquidus , solidus , nucleation , materials science , ampoule , glass transition , differential thermal analysis , frit , quenching (fluorescence) , chemical engineering , analytical chemistry (journal) , mineralogy , composite material , chemistry , chromatography , optics , alloy , polymer , fiber laser , physics , organic chemistry , diffraction , engineering , fluorescence , fiber
The glass transition, onset crystallization, solidus, and liquidus temperatures of a ZBLAN glass have been measured by differential thermal analysis in a sealed Pt ampoule. The onset crystallization was observed at 335°C for a powdered glass, while for a monolithic glass, prepared by in situ quenching in the Pt capsule, the onset crystallization was observed at 395°C, 135°C higher than T g . Surface‐induced heterogeneous nucleation is therefore proposed to be important for the crystallization of ZBLAN glasses. The solidus temperature was observed at 452°C, about 10°C lower than reported for the subsystem ZrF 4 –BaF 2 –NaF.