Structure changes in the sol-gel systems of hydrated oxides.

ABSTRACT

This work was undertaken partly with financial support of the RBRF of the Ministry of Science of the Russian Government (N95-03-09682a) and partly with financial support of the Ministry of Education, Science, Sports and Culture (MONBUSHO) of the Government of Japan.Sols of hydrated aluminium oxide, hydrated zirconium oxide and their mixtures were investigated during the xerogel-amorphous-product-crystalline-product transition by SAXS using synchrotron radiation. In the different temperature regions certain changes in structure and morphology were observed. Some correlation between the characteristics of the initial sols and their mixtures (the size and shape of the pores) was observed. In the temperature region 298-1173 K the characteristics of the mixed sol are defined by the characteristics of the initial sols.