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Viscosity of Porous Glasses
Author(s) -
Sura Vivek M.,
Panda Prakash C.
Publication year - 1990
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.1151-2916.1990.tb06748.x
Subject(s) - porosity , viscosity , materials science , isothermal process , sintering , composite material , temperature dependence of liquid viscosity , volume viscosity , cordierite , mineralogy , thermodynamics , relative viscosity , geology , ceramic , physics
Viscosity of porous glasses has been derived from the elastic stress analysis, using the viscous analogy. Viscosity as a function of porosity has been estimated for spherical as well as for arbitrary pore geometry. Since the pore geometry changes during sintering, a shape factor that varies with pore geometry has been considered to predict the viscosity–porosity relationship. Viscosity as a function of porosity was measured on cordierite‐type glass by isothermal sinter‐forging experiments and data showed good agreement with the analysis. Experimental data from literature on viscosity as a function of porosity on two other glasses also show good agreement with the analysis.