METHOD OF PRODUCING SILICON OXIDE COMPOUNDS DOPED WITH ALUMINIUM AND RARE-EARTH ELEMENTS Russian patent published in 2011 - IPC C01B33/14 

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry and can be used to produce silicon oxide compounds doped with aluminium and rare-earth elements which are used in quartz and optical glass manufacturing and in fibre optics for making laser and luminescent glass. A solution of salts of rare-earth elements and an aluminium-containing compound are simultaneously added to an alkaline solution of tetraalkoxy silane with pH 7.5-9.0. The reaction mixture is intensely stirred at temperature 10-60°C. The formed sol is evaporated at temperature not higher than 100°C to a powdered state. The salts of rare-earth elements used are corresponding nitrates, chlorides or acetates. Isopropylate or aluminium fluoro-butylate is used as the aluminium-containing compounds.

EFFECT: invention enables to obtain highly-pure homogeneous powder not containing carbonaceous inclusions.

4 cl, 4 ex