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Viscosity and Surface Tension of Oxynitride Glass Melts
Author(s) -
KaplanDiedrich Hannelore,
Eckebracht Andrea,
Frischat Günther H.
Publication year - 1995
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.1151-2916.1995.tb08454.x
Subject(s) - surface tension , glass transition , viscosity , materials science , thermodynamics , drop (telecommunication) , oxide , mineralogy , composite material , chemistry , polymer , metallurgy , telecommunications , physics , computer science
The viscosities and surface tensions of three MgO‐Al 2 O 3 ‐Y 2 O 3 ‐SiO 2 ‐based oxynitride glass melts were measured. Glass transition temperature, Littleton temperature, and sink‐in temperature were obtained, and by using the Vogel‐Fulcher‐Tammann equation the viscosities were calculated from T g (820° to 940°C) to 1600°C. The surface tensions were measured by the drop weight and the drop geometry methods and displayed values between about 500 and 600 N.mm −1 . These values are about a factor of two higher than the surface tensions of oxide glass melts.