کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1481549 991533 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of glass composition on activation energy of viscosity in glass-melting-temperature range
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Effect of glass composition on activation energy of viscosity in glass-melting-temperature range
چکیده انگلیسی

In the high-temperature range, where the viscosity (η) of molten glass is < 103 Pa s, the activation energy (B) is virtually independent of temperature (T). Moreover, the coefficient A in the Arrhenius relationship, ln(η) = A + B/T, is nearly independent of melt composition. Hence, the viscosity–composition relationship for η < 103 Pa s is defined by B as a function of composition. Using a database encompassing over 1300 compositions of high-level waste glasses with nearly 7000 viscosity data, we developed mathematical models for B(x), where x is the composition vector in terms of mass fractions of components. In this paper, we present 13 versions of B(x) as first- and second-order polynomials with coefficients for 15 to 39 components, including Others, a component that sums constituents having little effect on viscosity.


► We have developed 1st and 2nd order models for viscosity of nuclear waste glasses.
► Our models are based on nearly 7000 data.
► Activation energy is a single factor determining viscosity–composition relationship at < 103 Pa s.
► Measured-calculated deviation of data exhibits a near-Gaussian distribution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 358, Issue 15, 1 August 2012, Pages 1818–1829
نویسندگان
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