Advertisement

Journal of Materials Science

, Volume 27, Issue 2, pp 465–471 | Cite as

Mechanochemical effects for some Al2O3 powders of dry grinding

  • T. Ban
  • K. Okada
  • T. Hayashi
  • N. Ōtsuka
Papers

Abstract

Three kinds of Al2O3 powders, i.e. two kinds of low-soda Al2O3 with average particle sizes of 3.9 and 0.6 μm and an electrofused Al2O3 with an average particle size of 21.8 μm, were ground for up to 300 h in a dry vibration ball mill. Variations in particle-size distribution, specific surface area, crystallite size, lattice strain, effective temperature factor and lattice constant were examined against milling time. The mechanism of grinding was found to differ between low-soda Al2O3 and electrofused Al2O3. The mechanochemical effects on these Al2O3 powders occurred in the order decrease of crystallite size → increase of effective temperature factor → increase of lattice strain. The length of the a-axis was clearly increased by a prolonged grinding. The difference in the ground state of three specimens was attributed to differences in the physical state of particles originating from the preparation methods, and also to particle size.

Keywords

Polymer Particle Size Al2O3 Physical State Specific Surface 
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.

References

  1. 1.
    K. Yamada, Ceramics (Jpn) 17 (1982) 810.Google Scholar
  2. 2.
    M. Inagaki, H. Furuhashi, T. Ozeki and S. Naka, J. Mater. Sci. 8 (1973) 312.Google Scholar
  3. 3.
    T. Iwamoto and M. Senna, J. Soc. Powder Tech. Jpn 21 (1984) 774.Google Scholar
  4. 4.
    Y. Kanno, Yogyo Kyokai Shi 94 (1986) 1218.Google Scholar
  5. 5.
    C. Brodhag, R. A. L. Drew and L. Zarnon, In “High-Tech Ceramics”, Materials Science Monograph 38B edited by P. Vincenzini (Elsevier Amsterdam, 1987) p. 829.Google Scholar
  6. 6.
    M. Yasuoka, K. Okada, T. Hayashi and N. Otsuka, Ceram. Intern. (to be published).Google Scholar
  7. 7.
    M. Yasuoka, T. Hayashi, K. Okada and N. Otsuka, J. Ceram. Soc. Jpn 98 (1990) 269.Google Scholar
  8. 8.
    W. H. Hall, Proc. Phys. Soc. A62 (1949) 741.Google Scholar
  9. 9.
    T. Sakurai, RSLC-3(UNICS) Universal Crystallographic Computation Program System (Crystallographic Society of Japan, 1967).Google Scholar
  10. 10.
    JCPDS card No. 10–173.Google Scholar
  11. 11.
    Y. Arai, T. Yasue and H. Miyake, Nippon Kagaku Kaishi (1972) 547.Google Scholar
  12. 12.
    W. H. Waker, W. K. Lewis, W. H. McAdam and E. R. Gilliland, “Principles of Chemical Engineering” (McGraw-Hill, 1937) p.Google Scholar
  13. 13.
    K. Kubo, “Mechanochemistry of Inorganic Materials” (Sogo Gijutsu, Tokyo, 1987) p. 99.Google Scholar
  14. 14.
    F. C. Bond, Trans. AIME Min. Engng 193 (1952) 484.Google Scholar
  15. 15.
    T. Tanaka, Kagaku Kogaku 18 (1954) 160.Google Scholar
  16. 16.
    P. A. Rehbinder and G. S. Chodakow, Silikattechnik 13 (1962) 200.Google Scholar

Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • T. Ban
    • 1
  • K. Okada
    • 1
  • T. Hayashi
    • 1
  • N. Ōtsuka
    • 1
  1. 1.Department of Inorganic MaterialsTokyo Institute of TechnologyTokyoJapan

Personalised recommendations