Skip to main content
SpringerLink
Log in

The effect of an added seed on the phase transformation and the powder properties in the fabrication of Al2O3 powder by the sol-gel process

  • Published:
Journal of Materials Science Aims and scope Submit manuscript

Abstract

α-Al2O3 powder was produced by the sol-gel process. The prepared sol-gels were seeded with 1.5 wt% powder (⩽0.12μm). The phase transformation of Boehmite into α-Al2O3 and also the particle size distribution of the transformed α-Al2O3 were strongly influenced by seeding and the heating rate during calcination. α-Al2O3 seed particles have been shown to act as a nuclei for the transition of θ- to α-Al2O3 and also to increase the driving force of the phase transformation, which consequently lowers the transformation temperature by about 200 °C. The particles derived from the seeded sol-gels retarded the formation of vermicular microstructures and were finer than those in the unseeded case. The seeding and the control of the heating rate during calcination could inhibit the grain growth due to transformation into α-Al2O3. Fine particles which are homogeneous and have a high sinterability at lower temperatures could be obtained.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. W. H. Gitzen, “Alumina as a ceramic material”. (American Ceramic Society, OH, 1970) pp. 14–20.

    Google Scholar 

  2. H. P. Klug andL. E. Alexander, “X-ray diffraction procedures for polycrystalline and amorphous materials”, (John Wiley & Sons, New York, 1974) pp. 668–687.

    Google Scholar 

  3. S. J. Wilson,J. Solid State Chem. 30 (1979) 247.

    Google Scholar 

  4. F. W. Dynys andJ. W. Halloran,J. Amer. Ceram. Soc. 65 (1982) 442.

    Google Scholar 

  5. P. A. Badkar andJ. Bailey,J. Mater. Sci. 11 (1976) 1794.

    Google Scholar 

  6. C. S. Oh andG. Tomandl, in “Ceramics in theory and practice, Toughening of ceramic materials”, DGM/DKG symposium proceedings (Hamburg, Germany, October 8–9, 1991) edited by N. Claussen, (D. G. M. Informationsgesellschaft, Verlag, 1992) pp. 173–181.

  7. H. Salman andH. Scholze, “Ceremics, part 1: Basic principles and important properties,” (Springer-Verlag. New York, 1983) pp. 151–160.

    Google Scholar 

  8. C. S. Oh, Ph.D. thesis. Erlangen-Nürnberg University, Erlangen, Germany (1993).

    Google Scholar 

Download references

Author information

Author notes

  1. Chang -Seob Oh

    Present address: Group III of Mando Machinery Co., R&D Centre, 472-900, Kyongki-do, Korea

  2. G. Tomandl

    Present address: Institute for Ceramic Materials, Freiberg Univ. Freiberg, 09599, Germany

  3. Moon -Hwan Lee

    Present address: Dept. of Materials Science Engineering, Washington University, Seattle, Washington, USA

Authors and Affiliations

  1. Institute for Materials Science III (Glass & Ceramics), Erlangen-Nürnberg University Erlangen, 8520, Germany

    Chang -Seob Oh & G. Tomandl

  2. Department of Inorganic Materials Engineering, Hanyang University, 133-791, Seoul, Korea

    Moon -Hwan Lee & Sung -Churl Choi

Authors
  1. Chang -Seob Oh
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. G. Tomandl
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Moon -Hwan Lee
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Sung -Churl Choi
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Oh, C.S., Tomandl, G., Lee, M.H. et al. The effect of an added seed on the phase transformation and the powder properties in the fabrication of Al2O3 powder by the sol-gel process. J Mater Sci 31, 5321–5325 (1996). https://doi.org/10.1007/BF01159299

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01159299

Keywords

Search

Navigation