Influences of different components on viscosities of CaO-MgO-Al2O3-SiO2 melts
The present study is aimed to distinguish the different influences of CaO and MgO, as well as Al2O3 and SiO2 on viscosity of CaO-MgO-Al2O3-SiO2 melts. It is found that for melt without Al2O3, viscosity increases monotonously as CaO is gradually replaced by MgO. The addition of Al2O3 leads t...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Belgrade, Technical Faculty, Bor
2014-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2014/1450-53391400016Z.pdf |
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| Summary: | The present study is aimed to distinguish the different influences of CaO and
MgO, as well as Al2O3 and SiO2 on viscosity of CaO-MgO-Al2O3-SiO2 melts. It
is found that for melt without Al2O3, viscosity increases monotonously as CaO
is gradually replaced by MgO. The addition of Al2O3 leads to a complex
variation of viscosity. In different composition ranges, viscosity may
exhibit different variation tendencies as changing the relative contents of
CaO and MgO while keeping contents of other components constant. It is also
found that when replacing SiO2 by equivalent mole of Al2O3, (i) in CaOAl
2O3-SiO2 system, viscosity increases when Al2O3 content is small relative to
CaO content (there are enough Ca2+ ions to charge compensate Al3+ ions), but
decreases when CaO content is inadequate for charge compensation; (ii) in
MgO-Al2O3-SiO2 system, viscosity always decreases as substituting Al2O3 for
SiO2. The reason for this difference for two systems may be resulted from the
weak charge compensation ability of Mg2+ ion for Al3+ ion relative to Ca2+
ion. All the viscosity variations can be interpreted well by our new proposed
viscosity model. |
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| ISSN: | 1450-5339 |