Processing and Property Evaluation of Alumina Aerogel Based Ceramic Nanocomposites


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Aerogels are sol-gel derived mesoporous materials with low apparent density and large specific surface areas. The mechanical property evaluation of pulsed electric current sintered (PECS) alumina and its composite aerogels with nanosized metallic dispersions is an area of interest. In the present work alumina, alumina-copper, alumina-nickel, alumina-cobalt and alumina-tungsten aerogels have been synthesized by super critical drying of respective the sols. The samples were pre-calcined under controlled sintering conditions and pulsed electric current sintered at two different temperatures: (1) at a lower sintering temperature with short residence time (1250°C for 5min) and (2) at a high temperature with prolonged soaking time (1450°C for 30 min) and their mechanical properties were evaluated.



Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara




A. Yamuna et al., "Processing and Property Evaluation of Alumina Aerogel Based Ceramic Nanocomposites", Key Engineering Materials, Vols. 317-318, pp. 73-76, 2006

Online since:

August 2006




[1] C.J. Dos and R. Zallen: Phy. Rev. B, Vol. 48 (1993), p.48.

[2] T. Hirouchi, T. Osaki, T. Sugiyama, H. Masuda, M. Horio, K. Suzuki, T. Mori and T. Sago: J. Chem. Soc. Faraday Trans. Vol. 90 (1994), p.2573.

[3] U. Janosovits, G. Zeigler, U. Scharf and A. Wokauun: J. of Non-Cry. Solids, Vol. 210 (1997), p.1.

[4] J.F. Poco, J,H. Satcher Jr., L.W. Hrubesh: J. of Non-Cry. Solids, Vol. 285 (2001), p.57.

[5] K. Naplocha, A. Janus, J.W. Kaczmar and Z. Samsonowicz: J. of Mat. Tech., Vol. 106 (2000), p.119.

[6] M. Moner-Girona, E. Martinez, A. Roig, J. Esteve and E. Molins: J. of Non-Cry. solids, Vol. 285 (2001), p.244.

[7] D. Hardy and D. J. Green: J. of Eur. Cerm. Soc, Vol. 15 (1995), p.769.