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.
References
[1]
Qin, H.Y. (2013) Research Progress of Silica Aerogel Materials. Science & Technology Association Forum, 40-43.
[2]
Li, P. (2014) Preparation and Properties of Silica Aerogel Particles. Chang’an University, Xian, 4-6.
[3]
Dong, Z.J., Li, X.K. and Yuan, G.M. (2006) Mo Mullite Fiber Enhanced SiO2 Aerogel Composite Material Preparation and Performance. New Chemical Materials, No. 7, 58-61.
[4]
Li, T. (2011) Study on the Preparation of Low Thermal Conductivity Insulation Materials. Wuhan University of Technology, Wuhan, 9-10.
[5]
Wang, F. (2009) Silica Aerogels Hydrophobic Modified and Ambient Pressure Dying. Beijing University of Chemical Technology, Beijing, 7-12.
[6]
Wu, G.Y., Cheng, X., Yu, Y.X., et al. (2010) Preparation of Silica Aerogels via Ambient Pressure Drying. Progress in Chemistry, 22, 1892-1900.
[7]
Yang, K., Pang, J.W., Wu, B.R., et al. (2009) Research Progress on Modification Methods and Research Progress of Silica Gel. Transactions of Beijing Institute of Technology, No. 9, 833-837.
[8]
Sun, D., Zhou, C.L., Chen, H., et al. (2015) Research Status and Application Prospect of Silica Gel. Advanced Ceramics, No. 4, 24-31.
[9]
Rao, A.V. and Kulkarni, M. (2002) Hydrophobic Properties of TMOS/TMES-Based Silica Aerogels. Materials Reasear Bulletin, 37, 1667-1677.
https://doi.org/10.1016/S0025-5408(02)00795-X
[10]
Wang, F., Li, R.F. and Luo, Z.K. (2010) Preparation of Mesoporous SiO2 by Normal Pressure Drying Method. Journal of Shenzhen University Science and Engineering, No. 1, 70-75.
[11]
Yao, S.Y. (2006) Preparing Method of Continuous Mullite Fibers. China Academy of Mechinery Science and Technology, Beijing, 6-9.
[12]
Wu, Z. (2010) Preparation and Characterization of Silica Aerogels by Supercritical Drying Technique. Changchun University of Science and Technology, Changchun, 22-26.
[13]
Tian, H., Chen, L.X. and Liu, Q.W. (2007) The Properties, Preparation and Application of Silica Sol. Science and Technology of Overseas Building Materials, No. 2, 8-11.
[14]
Fan, Z.T., Wang, J.N., Wang, H.F., et al. (2007) Present Situation and Development trend of Water Glass Binder Modification Technology. Modern Cast Iron, No. 04, 76-80.
[15]
He, Y. (2005) Rapid Thermal Conductivity Measurement with a Hot Disk Sensor: Part 2. Characterization of Thermal Greases. Thermochimica Acta, 436, 130-134.
https://doi.org/10.1016/j.tca.2005.07.003
