Ceramics-Silikáty 47, (2) 70 - 74 (2003) |
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EFFECT OF Fe₂O₃ ON THE DENSIFICATION AND PROPERTIES OF LIME
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Ghosh Arup 1, Bhattacharya Tapas K. 2, Mukherjee Barundeb 1,
Tripathi Himansu S. 1,
Das Samir K. 1
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1 Refractories Division, Central Glass and Ceramic Research Institute
Kolkata-700 032, India
2
College of Ceramic Technology
73, A.C. Banerjee Lane, Kolkata-700 032, India
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Keywords: Sintering, Lime, Hydration Resistance, Microstructure
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Sintering of lime by one- and two- step calcination has been investigated. Samples obtained by double stage calcination
always exhibit higher bulk density than those of single stage process. Fe₂O₃ helps in the sintering of CaO by liquid phase formation
at the sintering temperature. The grain size of sintered lime is higher in the presence of Fe₂O₃ additive. Fe₂O₃ containing
samples have improved hydration resistance due to their larger grain size compared to Fe₂O₃ free samples. Lime samples
containing 4 wt.% Fe₂O₃ and sintered at 1600°C have CaO as the major phase with a small amount of dicalcium ferrite
phase (C2F). The maximum flexural strength at 1300°C is achieved by the samples containing 2wt.% Fe₂O₃ and sintered at
1600°C. |
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