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A reinvestigation of phase equilibria in the system Al2O3-SiO2-ZnO

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Abstract

The phase equilibria and liquidus temperatures in the binary SiO2-ZnO system and in the ternary Al2O3-SiO2-ZnO system at low Al2O3 concentrations have been experimentally determined using the equilibration and quenching technique followed by electron probe X-ray microanalysis. In the SiO2-ZnO system, two binary eutectics involving the congruently melting willemite (Zn2SiO4) were found at 1448±5 °C and 0.52±0.01 mole fraction ZnO and at 1502±5 °C and 0.71±0.01 mole fraction ZnO, respectively. The two ternary eutectics involving willemite previously reported in the Al2O3-SiO2-ZnO system were found to be at 1315±5 °C and 1425±25 °C, respectively. The compositions of the eutectics are 0.07, 0.52, and 0.41 and 0.05, 0.28, and 0.67 mole fraction Al2O3, SiO2, and ZnO, respectively. The results of the present investigation are significantly different from the results of previous studies.

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  1. Robert Hansson (Research Scholar, Laboratory Manager)

    Present address: PYROSEARCH, Pyrometallurgy Research Centre, School of Engineering, The University of Queensland, 4072, St Lucia, Queensland, Australia

Authors and Affiliations

  1. ALcontrol AB, 581 10, Linkoping, Sweden

    Robert Hansson (Research Scholar, Laboratory Manager)

  2. PYROSEARCH, Pyrometallurgy Research Centre, School of Engineering, The University of Queensland, 4072, St Lucia, Queensland, Australia

    Baojun Zhao (Research Fellow), Peter C. Hayes (Professor and Director) & Evgueni Jak (Associate Professor and Research Director)

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  1. Robert Hansson
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  2. Baojun Zhao
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  3. Peter C. Hayes
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  4. Evgueni Jak
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Hansson, R., Zhao, B., Hayes, P.C. et al. A reinvestigation of phase equilibria in the system Al2O3-SiO2-ZnO. Metall Mater Trans B 36, 187–193 (2005). https://doi.org/10.1007/s11663-005-0019-y

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  • DOI: https://doi.org/10.1007/s11663-005-0019-y

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