FRICKE J. Aerogels [M]. Berlin:Springer-verlag, 1986. 201-209.
[2]
PAJONK G M. Aerogel catalyst [J]. Applied Catalysis, 1991,72:217-266.
[3]
BUCKLY A M, GREENBLATT M. The preparation and characterization of silica aerogels and xerogels doped with transition metal species [J]. Non-cryst Solids, 1992, 146:97-110.
[4]
TILLOTSON T M. Transparent ultra-low density silica aerogels prepared by a two-step sol-gel process [J]. Non-cryst Solids,1992, 145:11-16.
