7Tang Q,Wang T.Preparation of silica aerogel from rice hull ash by supercritical carbon dioxide drying. The American Journal of Surgery . 2005
8Wang J D.White carbon black preparation and its prospect. Journal of Northeastern University . 2009
9Schmidt M,Schwertfeger F.Applications for silica aerogel products. Journal of Non crystalline Solids . 1998
10Yachi A,Takahashi R,Sato S,et al.Silica gel with continuous macropores prepared from water glass in the presence of poly(acrylic acid). Journal of Non crystalline Solids . 2005
