Ceramics-Silikáty 54, (2) 128 - 132 (2010) |
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EFFECT OF COPPER IONS ON MULLITE FORMATION FROM ALUMINOSILICATE PRECURSOR
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Roy Jagannath 1, Bandyopadhyay Narayan 2, Das Santanu 4,
Maitra Saikat 3
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1 Department of Engineering Chemistry, Camellia Institute of Technology, Kolkata-700129, India
2 Government College of Engineering and Ceramic Technology,
73, A.C.Banerjee Lane, Kolkata-700010, India
3 Universiti Teknologi PETRONAS,Tronoh-31750, Perak, Malaysia
4 Mechanical and Materials Engineering Department, Florida International University, USA
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Keywords: Mullite, Copper ions, Aluminosilicate powder, Chemical preparation, Sintering, Microstructure
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Aluminium nitrate and silicic acid were used for the synthesis of aluminosilicate precursor powder of mullite by colloidal
process. Copper ions were used in different concentration as sintering additive to the synthesized precursor powder. The
compacted powder mixes were sintered at different elevated temperatures. The influence of copper ions on the sintered
samples was investigated by the measurement of different physico-mechanical properties, like bulk density, porosity, flexural
strength and fracture toughness. The microstructure and phase analysis of the sintered masses were carried out by scanning
electron microscopy and XRD analysis. It was observed that copper ions exhibited positive effect on the densification and
development of mullite phase in the sintered compacts. |
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