Abstract
Glass microballoons (GB) of about 1 mm in diameter were prepared by ultrasonic spray pyrolysis from sodium silicate solution. A silica-rich type of glass microballoons (SB) was prepared by acid treatment of GB. The structural changes of both microballoons with thermal treatment up to 973 K were examined. Both GB and SB showed properties similar to hydrated sodium silicate glass, to some extent. SB was more thermally stable than GB, but the spherical structures of both microballoons were collapsed by heating at 973 K; cristobalite was observed in samples heated at 973 K. The loosely and tightly incorporated water molecules evolved up to 573 K and near 850 K, respectively. The crystallization of cristobalite caused tightly incorporated water molecules to develop. The ultramicropores accessible only to H2O molecules in SB gradually decreased by heating and disappeared by heating at 773 K.
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References
R. K. Iler, The Chemistry of Silica (John Wiley and Sons Inc., New York, 1979), p. 625.
M.R. Bhambhani, P.A. Cutting, K. S. W. Sing, and D.H. Turk, J. Colloid Interface Sci. 38, 109 (1972).
M.L. Hair, ACS Symp. Ser. 137, 1 (1982).
S. Kondo, Ads. Sci. Technol. 3, 109 (1986).
J. P. Gallas, J. C. Lavalley, A. Burneau, and O. Barres, Langmuir 7, 1235 (1991).
J. G. Vail, Soluble Silicates (Reinhold, New York, 1952).
L. S. Dent Glasser and C.K. Lee, J. Appl. Chem. Biotechnol. 21, 127 (1971).
J. R. Sweet and W.B. White, Physics Chem. Glasses 10, 246 (1969).
C. K. Wu, J. Am. Ceram. Soc. 63, 453 (1980).
Y. Moriya and M. Nogami, J. Non-Cryst. Solids 38–39, 667 (1980).
M. Tomazawa, M. Takata, J. Acocella, E.B. Watson, and T. Takamori, Yogyo-Kyokai-Shi 91, 377 (1983).
T. Uchino, T. Sakka, and M. Iwasaki, J. Am. Ceram. Soc. 74, 306 (1991).
J. R. Farnand and I.E. Puddington, Powder Technol. 22, 11 (1979).
S. Koie, Hyomen 18, 52 (1980).
H. Verweij, G. DeWith, and D. Veeneman, J. Mater. Sci. 20, 1069 (1985).
J. G. Liu and D. L. Wilcox, Sr., J. Mater. Res. 10, 84 (1995).
K. Kaneko, H. Isobe, T. Katori, I. Tokunaga, T. Gouda, T. Suzuki, S. Ozeki, and K. Okuda, Colloids Surf. A 74, 47 (1993).
H. Ishizawa, O. Sakurai, N. Mizutani, and M. Kato, Am. Ceram. Soc. Bull. 65, 1399 (1986).
K. S. W. Sing, D. H. Everett, R. A. W. Haul, L. Moscou, R. A. Pierotti, J. Rouquerol, and T. Siemieniewska, Pure Appl. Chem. 57, 603 (1985).
R. W. Cranston and F. A. Inkley, Adv. Catalysis 9, 143 (1957).
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Isobe, H., Tokunaga, I., Nagai, N. et al. Characterization of hydrated silicate glass microballoons. Journal of Materials Research 11, 2908–2915 (1996). https://doi.org/10.1557/JMR.1996.0368
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DOI: https://doi.org/10.1557/JMR.1996.0368