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Measuring and Modeling Viscosity of CaO-Al2O3-SiO2(-K2O) Melt

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Abstract

The effect of K2O on viscosity in CaO-SiO2-Al2O3 melt has been measured by a rotating spindle viscometer. It is indicated from the experimental results that viscosity first increases then decreases with the increasing content of K2O; the maximum viscosity occurs in the field of K2O/Al2O3 > 1. After gradually adding K2O, the transformation of bridging oxygen (from being bonded with Al3+ ion charge compensated by Ca2+ ion to that compensated by K+ ion, for the higher priority of K+ ion relative to Ca2+ ion) increases the viscosity, whereas the increase of content of nonbridging oxygen decreases viscosity. The two factors lead to the complicate variation behavior of viscosity. The viscosity model proposed in our previous papers describes this phenomenon well.

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Acknowledgment

The authors wish to thank the Chinese Natural Science Foundation for their kind support under the contract 51174022.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy and School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, P.R. China

    Guo-Hua Zhang (Lecturer) & Kuo-Chih Chou (Professor)

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  1. Guo-Hua Zhang
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  2. Kuo-Chih Chou
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Correspondence to Kuo-Chih Chou.

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Manuscript submitted January 5, 2012.

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Zhang, GH., Chou, KC. Measuring and Modeling Viscosity of CaO-Al2O3-SiO2(-K2O) Melt. Metall Mater Trans B 43, 841–848 (2012). https://doi.org/10.1007/s11663-012-9668-9

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  • DOI: https://doi.org/10.1007/s11663-012-9668-9

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