Abstract
The shrinkage isotherms of the powder compacts of spherical soda-lime glasses were measured in the temperature range of 590° to 660°C in air. An analytical equation for the initial sintering of glass powders was developed from the viewpoint of non-Newtonian flow. The shrinkage data measured with a dilatometer consisting of a linear variable transformer were best correlated with the equation. The results indicated that the length of unit flow, δ, was 3-10Å and that the viscosity coefficients were in fairly good agreement with those obtained by other authors.
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