Abstract
Crystallization and reaction kinetics of a crystallizable K2O–CaO–SrO–BaO–B2O3–SiO2 glass powder with 17–40 vol% titania powder were investigated. The initially amorphous K2O–CaO–SrO–BaO–B2O3–SiO2 glass powder formed cristobalite (SiO2) and pseudowollastonite [(Ca, Ba, Sr)SiO3] during firing. The above crystalline phases were completely replaced by a crystalline phase of titanite [(Ca, Sr, Ba)TiSiO5] when the amount of added titania was greater than a critical value, e.g., 10 vol%, at 99–1100 °C. A chemical reaction taking place at the interface between titania and the glass was attributed to the above observation. The dissolved titania changed the composition of the glass, and the dissolution kinetics was much faster than the formation of cristobalite and pseudowollastonite. Activation energy analysis showed that the crystallization of titanite [(Ca,Sr,Ba)TiSiO5] was controlled by a reaction-limiting kinetics of formation for the Ti–O bond.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
S.X. Dai, R.F. Huang, and D.L. Wilcox Sr., in Dielectric Materials and Devices, edited by K.M. Nair, A.S. Bhalla, T.K. Gupta, S.I. Hirano, B.V. Hiremoth, J.H. Jean, and R. Pohanka (American Ceramic Society, Westerville, OH, 2000), p. 483.
D. Wilcox Sr., R.F. Huang, and S.X. Dai, Ceram. Trans. 97, 201 (1999).
R.F. Huang and R.S. Kommrusch, in Materials and Processes for Wireless Communications, edited by T. Negas and H. Ling (American Ceramic Society, Westerville, OH, 1995), pp. 169–177.
J.H. Jean, Y.C. Fang, S.X. Dai, and D.L. Wilcox Sr., J. Am. Ceram. Soc. 84, 1354 (2001).
M. Avrami, J. Chem. Phys. 7, 1103 (1939).
M. Avrami, J. Chem. Phys. 8, 212 (1940).
M. Avrami, J. Chem. Phys. 9, 177 (1941).
J.H. Jean, Y.C. Fang, S.X. Dai, and D.L. Wilcox, Sr. (in preparation).
R.A. Robie, B.S. Hemingway, and J.R. Fisher, Thermodynamic Properties of Minerals and Related Substances at 298.15 K and 1 Bar Pressure and at Higher Temperatures, Geological Bulletin, 1452 (United States Government Printing Office, 1978).
J.H. Jean and T.K. Gupta, J. Mater. Res. 8, 356 (1993).
J.H. Jean and T.K. Gupta, J. Am. Ceram. Soc. 76, 2010 (1993).
E.E. Underwood, A.R. Colcord, and R.C. Waugh, in Ceramic Microstructures, edited by R.M. Fulrath and J.A. Pask (Westview Press, Boulder, CO, 1968), Chap. 1.
C.R. Chang and J.H. Jean, J. Am. Ceram. Soc. 82, 1725 (1999).
W.D. Kingery, H.K. Bowen, and D.R. Uhlmann, Introduction to Ceramics, 2nd ed. (John Wiley, New York, 1976), p. 99.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Jean, JH., Fang, YC., Dai, S.X. et al. Sintering of a Crystallizable K2O–CaO–SrO–BaO–B2O3–SiO2 Glass with Titania Present. Journal of Materials Research 17, 17 (2002). https://doi.org/10.1557/JMR.2002.0262
Received:
Accepted:
Published:
DOI: https://doi.org/10.1557/JMR.2002.0262