Preparation and Characterization of Mullite-Silica Aerogel Composite Material
Published: 1 January 2018
Open Journal of Organic Polymer Materials , Volume 08, pp 43-52; https://doi.org/10.4236/ojopm.2018.84004
Abstract: Silica aerogel due to the high specific surface area, nanometer level pores and low density of the micro structure, had excellent heat-insulating properties. But the characteristics of silica aerogel with low density and high voidage resulted in poor mechanical properties. In order to improve the strength of materials and meet the actual needs, in this paper the heat-insulating composite material was made from the silica aerogel and mullite fiber. This kind of composite material mainly contented of mullite fiber, formed macro block structure, that gas gel is coated and filled with mullite fiber. Furthermore, the composite material had good strength and kept excellent thermal stability at 600°C. In addition the density of composite decreased with the increasing of the gas gel content.
Keywords: Silica / Aerogel / Mullite / Composite Materials
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