EP 3390301 A1 20181024 - AMMONIA TREATMENT OF SILICA POWDER DURING THE PRODUCTION OF SILICA GLASS
Title (en)
AMMONIA TREATMENT OF SILICA POWDER DURING THE PRODUCTION OF SILICA GLASS
Title (de)
AMMONIAKBEHANDLUNG VON SILIZIUMDIOXIDPULVER BEI DER HERSTELLUNG VON QUARZGLAS
Title (fr)
TRAITEMENT À L'AMMONIAC D'UNE POUDRE DE DIOXYDE DE SILICIUM LORS DE LA FABRICATION DE VERRE DE SILICE
Publication
Application
Priority
- EP 15201116 A 20151218
- EP 2016081525 W 20161216
Abstract (en)
[origin: WO2017103171A1] The invention relates to a method for producing a silica glass article, involving method steps i.) providing a silica granulate, ii.) forming a glass melt from the silica granulate, and iii.) forming a silica glass article from at least some of the glass melt, step i.) consisting of steps I. producing a silica powder using at least two particles made from a silicon-chlorine compound, II. bringing the silica powder into contact with ammonia so as to obtain a treated silica powder, and III. granulating the treated silica powder so as to obtain a silica granulate, the chlorine content of the silica powder being higher than the chlorine content of the silica granulate. The invention further relates to a silica glass article that can be obtained by said method. The invention also relates to a method for producing a silica granulate. The invention finally relates to an optical waveguide, an illuminant and a molded article, each of which can be obtained by further processing the silica glass article.
IPC 8 full level
C03B 20/00 (2006.01); C03B 19/06 (2006.01); C03B 19/10 (2006.01); C03B 37/012 (2006.01); C03C 3/06 (2006.01); C03C 12/00 (2006.01)
CPC (source: EP US)
C01B 33/18 (2013.01 - EP US); C03B 19/066 (2013.01 - EP US); C03B 19/106 (2013.01 - EP US); C03B 19/1065 (2013.01 - US); C03B 19/108 (2013.01 - EP US); C03B 19/1095 (2013.01 - EP US); C03C 3/06 (2013.01 - EP US); C03C 13/045 (2013.01 - EP US); C01P 2004/51 (2013.01 - US); C01P 2004/61 (2013.01 - US); C01P 2006/10 (2013.01 - US); C01P 2006/12 (2013.01 - US); C01P 2006/14 (2013.01 - US); C03B 17/04 (2013.01 - EP US); C03B 2201/07 (2013.01 - EP US); C03B 2201/23 (2013.01 - EP US); C03C 2201/11 (2013.01 - EP US); C03C 2201/23 (2013.01 - EP US); C03C 2201/26 (2013.01 - EP US); C03C 2201/32 (2013.01 - EP US); C03C 2203/44 (2013.01 - EP US); C03C 2203/54 (2013.01 - EP US); G01N 21/412 (2013.01 - EP); Y02P 40/57 (2015.11 - EP)
Citation (search report)
See references of WO 2017103171A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2017103171 A1 20170622; WO 2017103171 A9 20171123; CN 108698882 A 20181023; EP 3390301 A1 20181024; JP 2019503961 A 20190214; TW 201733930 A 20171001; US 2018370838 A1 20181227
DOCDB simple family (application)
EP 2016081525 W 20161216; CN 201680081955 A 20161216; EP 16815839 A 20161216; JP 2018530538 A 20161216; TW 105141761 A 20161216; US 201616062280 A 20161216