Abstract
The Young's modulus of silica aerogels is measured, using the three point flexural technique. Various parameters have been investigated, such as the concentration of silicon compounds as well as the catalyting conditions used to develop the initial alcogel and the heat treatment performed to densify the material. The elastic behavior of aerogels depends on the conditions of gel preparation, and the Young's modulus is shown to obey the power dependence E ≃ ρ3.7. This scaling exponent is compared to the percolation model predictions. On the other hand, the elastic behavior of different sets of aerogels is related to the spatial arrangement of the particles pointed out by fractal features.
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References
M. Gronauer, A. Kadur, and J. Fricke, Aerogels (Springer-Verlag), Proceedings in Physics 6, 167 (1986).
T. Woignier, J. Pelous, J. Phalippou, R. Vacher, and E. Courtens, J. Non-Cryst. Solids 95–96, 1197 (1987).
E. Courtens, J. Pelous, J. Phalippou, R. Vacher, and T. Woignier, Phys. Rev. Lett. 58, 128 (1987).
K. D. Keefer and D. W. Schaefer, Phys. Rev. Lett. 56, 2376 (1986).
R. Vacher, T. Woignier, J. Pelous, and E. Courtens, Phys. Rev. B 37 (11), 6500 (1988).
S. K. Sinha, T. Freltoft, and J. Kjems, in Kinetics of Aggregation and Gelation, edited by F. Family and D. P. Landau (Elsevier, Amsterdam, 1984), p. 87.
S. H. Chen and J. Teixeira, Phys. Rev. Lett. 57, 2583 (1976).
D. Stauffer, J. Chem. Soc. Faraday Trans. 72, 1354 (1972).
P. G. J. DeGennes, J. Phys. Lett. France 37, L-1 (1976).
S. Alexander, J. Phys. France 45, 2939 (1984).
S. Feng and P. N. Sen, Phys. Rev. Lett. 5, 216 (1984).
Y. Kantor and I. Webman, Phys. Rev. Lett. 52, 189 (1984).
B. Gauthier-Manuel and E. Guyon, J. Phys. Lett. France 41, 503 (1980).
N. Tokita, R. Niki, and K. Hikichi, J. Chem. Phys. 83, 2583 (1985).
M. Adam, M. Delsanti, D. Durand, G. Hild, and J. P. Munch, Pure Appl. Chem. 53, 1489 (1981).
G. Deutscher, R. Maynard, and O. Parodi, Europhysics Letters 6 (1), 49 (1988).
J. W. Essam, Rep. Prog. Phys. 43, 904 (1980).
G. W. Scherer, J. Non-Cryst. Solids 100, 77 (1988).
M. Prassas, J. Phalippou, and J. Zarzycki, Glastechn. Ber. 56K, 542 (1983).
R. Vacher, T. Woignier, J. Phalippou, J. Pelous, and E. Courtens, 4th Int. Conf. on Structure of Non-Crystalline Materials, Oxnard (1988), J. Non-Cryst. Solids 106, 161 (1988).
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Woignier, T., Phalippou, J. & Vacher, R. Parameters affecting elastic properties of silica aerogels. Journal of Materials Research 4, 688–692 (1989). https://doi.org/10.1557/JMR.1989.0688
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DOI: https://doi.org/10.1557/JMR.1989.0688