High-purity pyrogenically prepared silicon dioxide having metal contents of less than 0.2 µg/g is prepared by reacting a silicon tetrachloride having a metal content of less than 30 ppb by means of flame hydrolysis. The silicon dioxide can be utilised for the manufacture of high-purity glasses by means of the sol-gel process, which show a high-homogenity. It can be used for the production of shaped articles, which can be used as preforms for the optical fiber spinning.
申请公布号
WO2005026068(A3)
申请公布日期
2006.04.06
申请号
WO2004EP10335
申请日期
2004.09.16
申请人
DEGUSSA AG;JACOBSEN, HAUKE;OSWALD, MONIKA;SCHUMACHER, KAI;MOERTERS, MARTIN
发明人
JACOBSEN, HAUKE;OSWALD, MONIKA;SCHUMACHER, KAI;MOERTERS, MARTIN