Ceramics-Silikáty 41, (4) 141 - 146 (1997) |
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RELATING THE TEMPERATURE DEPENDENCE OF VISCOSITY TO THE CHEMICAL COMPOSITION OF CONTAINER GLASS
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Míka Martin, Piepel Gregory F.
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Battelle, Pacific Northwest Laboratories
P.O. Box 999, Richland, Washington 99352, U.S.A.
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A new approach is developed for modeling the temperature and composition dependence of glass viscosity in the system Na₂O-CaO-MgO-Al₂O₃-SiO₂. The temperature dependence is described using the equation log(log h) = A + B log T. The dependence of the coefficients A and B on chemical composition of the glass is expressed using reduced full-cubic mixture polynomials. The new approach is much simpler to develop and use than the previous approach, and it has the potential to yield better property-composition models. The new approach yields an improved model for the dependence of viscosity on composition in the Na₂O-CaO-MgO-Al₂O₃-SiO₂ glass system studied. |
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