Process for the preparation of synthetic silica, especially for the manufacture of optical fibres, synthetic silica and optical fibres obtained

摘要

Process for the preparation of synthetic silica, especially for the manufacture of optical fibres, which is carried out by oxidising thermal decomposition of a silicon compound in the gaseous phase. The operation is carried out in a medium comprising a small proportion of oxygen diluted in a neutral gas, the proportion of oxygen in relation to the neutral gas not exceeding 15 % by volume of their total volume. <IMAGE>