Abstract: Disclosed is a colloidal silica composition and a method for producing high-purity silica glass using the same. The colloidal silica composition of the present invention comprise an alkoxysilane compound, an organic solvent, deionized water, and a basic catalyst. The colloidal silica composition further includes a basic organic material for adjusting a hydrogen ion concentration (pH) to prevent the formation of agglomerates when concentrated. Silica glass having high purity and excellent sinterability can be produced using the colloidal silica composition of the present invention.

Abstract: The present invention relates to a process of producing a silica glass in which the sol is transported from a mixer to a former under a certain amount of pressure. The transportation path of the sol is vacuumized in order to remove macro bubbles that can be potentially produced while the sol is transported from the mixer to the former. The interior of a piping connecting between the mixer for bearing the sol and the former for forming the gel is maintained in the vacuum state so as to effectively remove the macro bubbles, which can be potentially produced during the transportation of the sol.