The paper introduces the formula, process and tensile strength of the organic-inorganic composite adhesive which is prepared by mixing acetalization of polyvinyl alcohol with silicasol.

And the silica sol prepared in lab and used in microelectronic industry is purified to 10 ~ -6. The purification mechanism is discussed.

It was shown by BET surface area that the suitable concentration of silica sol could make the catalysts have bigger surface areas, but preparation method had little influence on surface area.