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SYNTHESIS AND CHARACTERIZATION OF PRECURSOR FOR AL2O3-MULLITE COMPOSITE DERIVED FROM DEHYDROXYLATED KAOLINITE

Dr. Arabinda Mondal

Associate Professor in Ceramic, Department of Silpa-Sadana, PSV, Visva-Bharati, Sriniketan, Birbhum, WB

26-39

Vol: 6, Issue: 1, 2016

Receiving Date: 2015-11-15 Acceptance Date:

2015-12-15

Publication Date:

2016-01-10

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Abstract

With the objective of preparing a precursor powder for alumina-mullite composite through a nonconventional colloidal route and characterize the same, the present investigation was undertaken. The important physic-chemical characteristics like molar ratio, bulk density, surface area DTA, IR Spectrum of the synthesized mixed precursor powder were investigated. Equilibrium dehydration-rehydration characteristics of the hydrogel was also examined. The synthesized powders possessed significantly high surface area which followed a direct relationship with Al2O3 content in the composition. Thermal analysis of the precursor powder reflected the expulsion of both loosely bound gel water and dehydroxylation of aluminium hydroxide and the peak temperatures of DTA curves were influenced by the Al2O3 content. The nature of the Rehydration curves remained same irrespective of the mole ratio of SiO2: Al2O3. The magnitude of rehydration was directly related to the Al2O3 content in the composition.

Keywords: Alumina, Mullite, DTA-TGA, Dehydration, Rehydration.

References

  1. Aksay, R. J., Dabbs, D. M. and Sarikaya, M., “Mullite for structural, electronic and optical applications”, J. Am. Ceram. Soc., 74, 2343-58 (1991)
  2. Cividanes, L.S., Campos, T.M.B., Rodrigues, L.A., Brunelli, D.D. and Thim, G.P., “Review of Mullite Synthesis by Sol-Gel Method”, J Sol Gel Sci Technol, 55, 111-125 (2010).
  3. Ghate, B. B., Hasselman, D. and Spriggs, R. M., “Synthesis and Characterization of High Purity, Fine Grained Mullite”, Bull. Am. Ceram. Soc., 52 [9], 670-672 (1973).
  4. Bernardo, E., and Colombo, P., “Novel Mullite Synthesis based on Alumina Nanoparticles and A Praceramic Polymer”, J Am Ceram Soc, 89, 5, 1577-1583, (2006).
  5. Cassidy, D.J., Woolfrey, J.L., Bartlett, J.R. and Ben-Nissan, B.,“The Effect of Precursor Chemistry on The Crystallisation and Densification of Sol-Gel Derived Mullite Gels and Powders”, J Sol Gel Sci Technol, 10, 19-30 (1997).
  6. Pask, J.A., “Importance of Starting Materials on Reactions and Phase Equilibria in The Al2O3-SiO2 System”, J Eur Ceram Soc, 16, 101–108 (1996),.
  7. Bhattacharya, A.K., Hartridge, A. and Mallick, K.K., “Inorganic Aluminium Precursors In The Synthesis Of Muilite-An Investigation”, J Mater Sci, 31, 555l 5554 (1996).
  8. Ismail, M. G. M. U., Nakai, Z. and Minegishi, K., “Synthesis of Mullite Powder and Its Characteristics”, Int. J. High Technol. Ceram. 2 [2], 123-134 (1986).
  9. Klug, F. J., Prochazka, S. and Doremus, R. H., “Alumina-Silica Phase Diagram in the Mullite Region”, J. Am. Ceram. Soc., 70 [10], 750-759 (1987).
  10. McGee, T. D. and Wirkus, C. D., “Mullitization of Aluminium-Silicate Gels”, Am. Ceram. Soc. Bull., 51, 577-581 (1972)..
  11. Juliana Anggono, “Mullite Ceramics: Its Properties, Structure, and Synthesis”, J. Teknik Mesin 7 [1], 1 – 10 (2005) .
  12. Rifki, S., Bambang S. P., and Leanddas N., “A New Synthesis Route of Nano Mullite By Calcining Pulp Precursors”, J. the Australian Ceramic Society 47[1], 42-47 (2011).
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