Abstract
Cordierite gel powder prepared by the hydrolysis of an alkoxide complex was seeded with crystalline α-cordierite particles. The effects of seeding on the phase transformation and mechanical properties were studied. The unseeded cordierite gel powder crystallized into α-cordierite via μ-cordierite at 1050 °C. The μ-α cordierite transformation caused microcracks which led to poor flexural strengths of about 30 MPa, although the strength of μ-cordierite was 160 MPa. The seeding appeared to promote a direct formation of the α-cordierite from the amorphous state. The development of microcracks due to μ-α cordierite transformation could be prevented by the modified crystallization behavior, resulting in the improved flexural strength of α-cordierite of 190 MPa. The seeding also lowered the crystallization temperature of α-cordierite to 900 °C, which could be attributed to the epitaxial crystallization of the complex-alkoxide-derived cordierite gel powder.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. H. Kumar, P. W. McMillan, and R. R. Turmmala, U.S. Pat. No. 4301324, November 17, 1981.
J. C. Bernier, J. L. Rehspringer, S. Vilminot, and P. Poix, in Better Ceramics Through Chemistry II, edited by C. J. Brinker, D. E. Clark, and D. R. Ulrich (Mater. Res. Soc. Symp. Proc. 73, Pittsburgh, PA, 1986), p. 129.
C. Gensse and U. Chowdhry, in Better Ceramics Through Chemistry II, edited by C. J. Brinker, D. E. Clark, and D. R. Ulrich (Mater. Res. Soc. Symp. Proc. 73, Pittsburgh, PA, 1986), p. 693.
H. Suzuki, K. Ota, and H. Saito, Yogyo-Kyokai-Shi 95 (2), 163 (1987).
A.B. Hardy, G. Gowda, T.J. McMahon, R.E. Riman, W.E. Rhine, and H. K. Bowen, in Ultrastructure Processing of Advanced Ceramics, edited by J. D. Mackenzie and D. R. Ulrich (John Wiley & Sons, New York, 1988), p. 407.
T.J. McMahon, M.S. Thesis, Dept. of Mater. Sci. and Eng., MIT, Cambridge, MA (1987).
F. Babonneau, L. Coury, and J. Livage, J. Non-Cryst. Solids 121, 153 (1990).
U. Selvaraj, S. Komarneni, and R. Roy, J. Am. Ceram. Soc. 73 (12), 3663 (1990).
M. Okuyama, T. Fukui, and C. Sakurai, Proc. 1st Int. Ceram. Sci. & Tech. Cong. (Anaheim, CA, 1989).
M. Okuyama, T. Fukui, and C. Sakurai, J. Am. Ceram. Soc. 75 (1), 153 (1992).
B.H. Mussler and M.W. Shafer, Am. Ceram. Soc. Bull. 64 (11), 1459 (1985).
T.I. Barry, J. M. Cox, and R. Morrell, J. Mater. Sci. 13, 594 (1978).
M. Kumagai and G. L. Messing, J. Am. Ceram. Soc. 68 (9), 500 (1985).
M. Kumagai and G. L. Messing, J. Am. Ceram. Soc. 67 (11), C230 (1984).
R.A. Shelleman, G.L. Messing, and M. Kumagai, J. Non-Cryst. Solids 82, 277 (1986).
R. Roy, S. Komarneni, and W. Yarbrough, In Ultrastructure Processing of Advanced Ceramics, edited by J. D. Mackenzie and D.R. Ulrich (John Wiley & Sons, New York, 1988), p. 571.
R. Roy, Y. Suwa, and S. Komarneni, in Science of Ceramic Chemical Processing, edited by L. L. Hench and D. R. Ulrich (John Wiley & Sons, New York, 1986), p. 247.
A.M. Kazakos, S. Komarneni, and R. Roy, J. Mater. Res. 5, 1095 (1990).
U. Selvaraj, S. Komarneni, and R. Roy, J. Mater. Sci. 26, 3689 (1991).
H. Suzuki, K. Ota, and H. Saito, J. Mater. Sci. 23, 1534 (1988).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Okuyama, M., Fukui, T. & Sakurai, C. Effects of seeding on phase transformation and mechanical properties in complex-alkoxide-derived cordierite gel powder. Journal of Materials Research 7, 2281–2287 (1992). https://doi.org/10.1557/JMR.1992.2281
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.1992.2281