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.
Similar content being viewed by others
References
M. J. Edirisinghe and J. R. G. Evans, Int. J. High Tech. Ceram. 2 (1986) 1.
Idem., ibid. 2 (1986) 249.
E. Wainer, US Patent 2 593 507 (1952).
US Patent 7 06 728 (1954), assigned to Bendix Aviation Corporation.
K. Saito, T. Tanaka and T. Hibino, UK Patent 1 426 317 (1976), assigned to Tokyo Shibaura Electric Co. Ltd.
A. M. Litman, N. R. Schott and S. W. Tozlowski, Soc. Plast. Eng. Tech. 22 (1976) 549.
A. Johnsson, E. Carlstrom, L. Hermansson and R. Carlsson, Proc. Br. Ceram. Soc. 33 (1983) 139.
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.
Y. Tsuchiya and K. Sumi, J. Polym. Sci. A-1 6 (1968) 415.
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.
J. K. Wright, J. R. G. Evans and M. J. Edirisinghe, J. Amer. Ceram. Soc. 92 (1989) 1822.
J. K. Wright, M. J. Edirisinghe, J. G. Zhang and J. R. G. Evans, J. Amer. Ceram. Soc. 73 (1990) 2653.
C. L. Quackenbush, K. French and J. T. Neil, Ceram. Eng. Sci. Proc. 3 (1982) 20.
J. G. Zhang, M. J. Edirisinghe and J. R. G. Evans, Industr. Ceram. 9 (1989) 72.
M. J. Edirisinghe and J. R. G. Evans, Br. Ceram. Trans. J. 86 (1987) 18.
J. Szekely, J. W. Evans and H. Y. Sohn, “Gas-Solid Reactions” (Academic, New York, 1976) pp. 65–107.
S. L. Madorsky, J. Polym. Sci. 9 (1952) 133.
O. S. Özgen and B. Rand, Br. Ceram. Trans. J. 84 (1985) 70.
Idem., ibid. 84 (1985) 213.
T. H. Meltzer, J. J. Kelley and R. N. Goldey, J. Appl. Polym. Sci. 3 (1960) 84.
I. Mita and K. Horie, in “Degradation and Stabilization of Polymers”, edited by H. H. G. Jellinek (Elsevier, Amsterdam, 1983) p. 278.
L. Reich and S. S. Stivala, “Autooxidation of Hydrocarbons and Polyolefins” (Dekker, New York, 1969) pp. 462–470.
R. M. Barrer, in “Diffusion of Polymers”, edited by J. Crank and G. S. Park (Academic, London, 1968) p. 165.
D. Bedeaux and R. Kapral, J. Chem. Phys. 79 (1983) 1783.
S. Sridharan and R. I. Cukier, J. Phys. Chem. 91 (1987) 2962.
“Handbook of Chemistry and Physics”, 55th Edn, edited by R. C. Weast (CRC Press, Cleveland, Ohio, 1974) p. F215.
Loc. cit. 22, pp. 42–48.
Loc. cit. 22, p. 464.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Wright, J.K., Evans, J.R.G. Kinetics of the oxidative degradation of ceramic injection-moulding vehicle. J Mater Sci 26, 4897–4904 (1991). https://doi.org/10.1007/BF00549868
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00549868