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Journal of Materials Science

, Volume 26, Issue 18, pp 4897–4904 | Cite as

Kinetics of the oxidative degradation of ceramic injection-moulding vehicle

  • J. K. Wright
  • J. R. G. Evans
Papers

Abstract

The effective reaction depth during the pyrolysis of ceramic injection-moulded bodies in oxidizing atmospheres was deduced from isothermal thermogravimetry. The kinetic data were analysed (i) for the case of chemical reaction control, (ii) for mass transport control and (iii) for combined chemical and mass transport control. The shrinking core reaction modulus indicates that reaction rate was mainly controlled by the diffusion of oxygen into the surface region and degradation products out. The results are used to discuss the relative merits of oxidative and thermal degradation of organic vehicle for ceramic processing.

Keywords

Polymer Pyrolysis Thermogravimetry Degradation Product Thermal Degradation 
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.

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References

  1. 1.
    M. J. Edirisinghe and J. R. G. Evans, Int. J. High Tech. Ceram. 2 (1986) 1.CrossRefGoogle Scholar
  2. 2.
    Idem., ibid. 2 (1986) 249.CrossRefGoogle Scholar
  3. 3.
    E. Wainer, US Patent 2 593 507 (1952).Google Scholar
  4. 4.
    US Patent 7 06 728 (1954), assigned to Bendix Aviation Corporation.Google Scholar
  5. 5.
    K. Saito, T. Tanaka and T. Hibino, UK Patent 1 426 317 (1976), assigned to Tokyo Shibaura Electric Co. Ltd.Google Scholar
  6. 6.
    A. M. Litman, N. R. Schott and S. W. Tozlowski, Soc. Plast. Eng. Tech. 22 (1976) 549.Google Scholar
  7. 7.
    A. Johnsson, E. Carlstrom, L. Hermansson and R. Carlsson, Proc. Br. Ceram. Soc. 33 (1983) 139.Google Scholar
  8. 8.
    N. Grassie, in “Macromolecular Science”, MTP International Review of Science, Physical Chemistry Series One, Vol. 8, edited by C. E. M. Bawn (Butterworths, London, 1972) pp. 277–328.Google Scholar
  9. 9.
    Y. Tsuchiya and K. Sumi, J. Polym. Sci. A-1 6 (1968) 415.CrossRefGoogle Scholar
  10. 10.
    N. Grassie and A. Scotney, in ‘Polymer Handbook’, 2nd Edn, edited by J. Brandrup and E. M. Immergut (Wiley, New York, 1975) p. II, 467.Google Scholar
  11. 11.
    J. K. Wright, J. R. G. Evans and M. J. Edirisinghe, J. Amer. Ceram. Soc. 92 (1989) 1822.CrossRefGoogle Scholar
  12. 12.
    J. K. Wright, M. J. Edirisinghe, J. G. Zhang and J. R. G. Evans, J. Amer. Ceram. Soc. 73 (1990) 2653.CrossRefGoogle Scholar
  13. 13.
    C. L. Quackenbush, K. French and J. T. Neil, Ceram. Eng. Sci. Proc. 3 (1982) 20.CrossRefGoogle Scholar
  14. 14.
    J. G. Zhang, M. J. Edirisinghe and J. R. G. Evans, Industr. Ceram. 9 (1989) 72.Google Scholar
  15. 15.
    M. J. Edirisinghe and J. R. G. Evans, Br. Ceram. Trans. J. 86 (1987) 18.Google Scholar
  16. 16.
    J. Szekely, J. W. Evans and H. Y. Sohn, “Gas-Solid Reactions” (Academic, New York, 1976) pp. 65–107.CrossRefGoogle Scholar
  17. 17.
    S. L. Madorsky, J. Polym. Sci. 9 (1952) 133.CrossRefGoogle Scholar
  18. 18.
    O. S. Özgen and B. Rand, Br. Ceram. Trans. J. 84 (1985) 70.Google Scholar
  19. 19.
    Idem., ibid. 84 (1985) 213.Google Scholar
  20. 20.
    T. H. Meltzer, J. J. Kelley and R. N. Goldey, J. Appl. Polym. Sci. 3 (1960) 84.CrossRefGoogle Scholar
  21. 21.
    I. Mita and K. Horie, in “Degradation and Stabilization of Polymers”, edited by H. H. G. Jellinek (Elsevier, Amsterdam, 1983) p. 278.Google Scholar
  22. 22.
    L. Reich and S. S. Stivala, “Autooxidation of Hydrocarbons and Polyolefins” (Dekker, New York, 1969) pp. 462–470.Google Scholar
  23. 23.
    R. M. Barrer, in “Diffusion of Polymers”, edited by J. Crank and G. S. Park (Academic, London, 1968) p. 165.Google Scholar
  24. 24.
    D. Bedeaux and R. Kapral, J. Chem. Phys. 79 (1983) 1783.CrossRefGoogle Scholar
  25. 25.
    S. Sridharan and R. I. Cukier, J. Phys. Chem. 91 (1987) 2962.CrossRefGoogle Scholar
  26. 26.
    “Handbook of Chemistry and Physics”, 55th Edn, edited by R. C. Weast (CRC Press, Cleveland, Ohio, 1974) p. F215.Google Scholar
  27. 27.
    Loc. cit. 22, pp. 42–48.Google Scholar
  28. 28.
    Loc. cit. 22, p. 464.Google Scholar

Copyright information

© Chapman & Hall 1991

Authors and Affiliations

  • J. K. Wright
    • 1
  • J. R. G. Evans
    • 1
  1. 1.Department of Materials TechnologyBrunel UniversityUxbridgeUK

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