H. Itoh, T. Tabata, M. Kokitsu, N. Okazaki, Y. Imizu, A. Tada
Preparation of SiO2-Al2O3 Gels from Tetraethoxysilane and Aluminum Chloride : A New Sol-Gel Method Using Propylene Oxide as a Gelation Promoter
Journal of the Ceramic Society of Japan, Volume 101, Issue 1177, Pages 1081-1083 (September 1993)
JCeramicSocJpn101-1081