EP 1152988 A1 20011114 - METHOD FOR PRODUCING A QUARTZ GLASS BODY AND HOLDING ELEMENT MADE OF QUARTZ GLASS
Title (en)
METHOD FOR PRODUCING A QUARTZ GLASS BODY AND HOLDING ELEMENT MADE OF QUARTZ GLASS
Title (de)
VERFAHREN FÜR DIE HERSTELLUNG EINES QUARZGLASKÖRPERS UND HALTEELEMENT AUS QUARZGLAS
Title (fr)
PROCEDE DE PRODUCTION D'UN CORPS DE VERRE DE QUARTZ ET ELEMENT DE RETENUE EN VERRE DE QUARTZ
Publication
Application
Priority
- DE 19956570 A 19991124
- EP 0011208 W 20001114
Abstract (en)
[origin: WO0138239A1] In a prior art method for producing a quartz glass body, SiO2 particles are deposited on the cylindrical outer surface of a cylindrical mandrel (4), which rotates around the longitudinal axis thereof, while forming an essentially cylindrical porous blank (1), whereby a holding element (12) made of quartz glass is provided in the area of one of the ends of said blank (1). The aim of the invention is to improve, based on existing methods, the reproducibility of the properties of the products made of the quartz glass body. To this end, the invention provides that a holding element (2) is used which has a metastable OH content of less than 30 ppm by weight, and that the holding element (2) is subjected to a thermal pretreatment. A suitable holding element (2) for holding a blank made of quartz glass is characterized in that it is comprised of quartz glass that has a metastable OH content of less than 30 ppm by weight.
IPC 1-7
IPC 8 full level
C03B 20/00 (2006.01); C03B 8/04 (2006.01); C03B 19/14 (2006.01)
CPC (source: EP KR)
C03B 19/14 (2013.01 - KR); C03B 19/1484 (2013.01 - EP); C03B 2201/03 (2013.01 - EP)
Citation (search report)
See references of WO 0138239A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0138239 A1 20010531; CN 1213955 C 20050810; CN 1336903 A 20020220; DE 19956570 A1 20010621; DE 19956570 B4 20050324; EP 1152988 A1 20011114; JP 2003514755 A 20030422; JP 4634684 B2 20110216; KR 20010092796 A 20011026; TW 477777 B 20020301
DOCDB simple family (application)
EP 0011208 W 20001114; CN 00802883 A 20001114; DE 19956570 A 19991124; EP 00974527 A 20001114; JP 2001539802 A 20001114; KR 20017009246 A 20010723; TW 89122677 A 20001027