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Title: Parsimonious viscosity–composition relationships for high-temperature multicomponent glass melts

Journal Article · · Journal of Asian Ceramic Societies
ORCiD logo [1];  [2]; ORCiD logo [3]
  1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  2. AttainX Support Services Contractor to the USDOE Office of River Protection (ORP), Richland, WA (United States)
  3. USDOE Office of River Protection (ORP), Richland, WA (United States)

The activation energy of glass melt viscosity, η, is nearly constant at temperatures at which η < 100 Pa s. Provided that the preexponential factor is a composition-independent constant, only the activation energy is a function of composition, and viscosity–composition relationships of utmost simplicity can be formulated to provide a welcome advantage in computational fluid dynamics modeling of glass melting furnaces processing multicomponent glasses. Using a dataset with over 3000 viscosity values acquired experimentally for a temperature and composition region of low-activity nuclear waste glasses, we have generated three linear models for viscosity as a function of temperature and composition. Model A quantifies the effects of 20 viscosity-influencing components. Model B achieves a similar prediction accuracy after setting aside volatile components, whose concentrations may vary during glass processing. A parsimonious Model C reduces the number of viscosity-influencing components to a mere seven: Al2O3, B2O3, CaO, Li2O, Na2O, SiO2, and Others. In each model, the “Others” component summarizes the fractions of the remaining components. For all three models, the component coefficients are determined with a high confidence (low standard error) and a high coefficient of determination: 0.972 for Model A, 0.970 for Model B, and 0.949 for Model C.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1838075
Report Number(s):
PNNL-SA--165123
Journal Information:
Journal of Asian Ceramic Societies, Journal Name: Journal of Asian Ceramic Societies Journal Issue: 1 Vol. 10; ISSN 2187-0764
Publisher:
Taylor & FrancisCopyright Statement
Country of Publication:
United States
Language:
English

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