Journal of Materials Science

, Volume 37, Issue 19, pp 4049–4055 | Cite as

Effect of sintering on TiO2-impregnated alumina foams

  • M. Mann
  • G. E. Shter
  • G. S. Grader


The effect of sintering on the bulk properties, morphology and phase composition of ultralight Al2O3 foams impregnated with TiO2 was investigated in comparison with pure alumina foam in the temperature range of 900–1600°C in air. Impregnation was carried out by immersion of pre-sintered alumina foam in a sol of titanium isopropoxide-acetylacetone complex. The changes of the foam linear shrinkage, effective density and porosity were studied along with morphological evolution and relationship between these properties was demonstrated. Titania impregnation increased the linear shrinkage (LS) during sintering by a maximum of 5% relative to pure alumina foams. The change of LS and weight loss of TiO2/Al2O3 foams lead to a final density of 0.19 g/cm3 and porosity of 95%. The initial coating was found to develop a mosaic structure due to early shrinkage of the coating. After sintering at 1600°C the coating reacted with the underlying Al2O3 surface and became uniformly distributed. Finally, it was shown that the reacting TiO2 layer formed the tialite (Al2TiO5) phase below 1400°C. This Tialite coating remained intact under 1200°C without stabilizers.


TiO2 Titania Porosity Foam Al2O3 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    L. J. GIBSON and M. F. ASHBY, “Cellular Solids, ” 2nd ed. (Cambridge University Press, 1997).Google Scholar
  2. 2.
    G. S. GRADER, G. E. SHTER and Y. DE HAZAN, Israeli Patent Application no. 123969 (1998).Google Scholar
  3. 3.
    Idem., J. Mater. Res. 14 (1999) 1485.Google Scholar
  4. 4.
    R. J. H. CLARK, “The Chemistry of Titanium and Vanadium” (University College, London, 1968).Google Scholar
  5. 5.
    R. D. BAGLEY, I. B. CUTLER and D. L. JOHNSON, J. Amer. Ceram. Soc. 53 (1970) 136.Google Scholar
  6. 6.
    W. S. YOUNG and I. B. CUTLER, ibid. 53 (1970) 659.Google Scholar
  7. 7.
    W. D. KINGERY, “Introduction to Ceramics” (John Wiley & Sons, New York, 1967).Google Scholar
  8. 8.
    J. LIVAGE and C. SANCHEZ, J. Non Crystalline Solids 145 (1992) 11.Google Scholar
  9. 9.
    P. SEPULVEDA, The Am. Ceram. Soc. Bul. 76 (1997) 61.Google Scholar
  10. 10.
    S. M. LANG, C. L. FILLMORE and L. H. MAXWELL, J. Res. Nat. Bur. Stand. 48 (1952) 298.Google Scholar
  11. 11.
    M. CRISAN, M. ZAHARESCU, A. JITIANU, D. CRISAN and M. PREDA, J. Sol-Gel Sci. and Tech. 19 (2000) 409.Google Scholar
  12. 12.
    S. LICOCCIA, M. L. DI VONA, E. TRAVERSA, P. INNOCENZI and A. MARTUCCI, ibid. 19 (2000) 577.Google Scholar
  13. 13.
    M. ANDRIANAINARIVELO, R. J. P. CORRIU, D. LECLERCQ, P. H. MUTIN and A. VIOUX, ibid. 8 (1997) 89.Google Scholar
  14. 14.
    M. MANN, G. E. SHTER and G. S. GRADER, J. Mater. Res. 17(4) (2002) 831.Google Scholar

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • M. Mann
    • 1
  • G. E. Shter
    • 1
  • G. S. Grader
    • 1
  1. 1.Chemical Engineering DepartmentTechnionHaifaIsrael

Personalised recommendations