TY - GEN A1 - Speit, Burkard A1 - Döhring, Thorsten A1 - Wolff, Silke T1 - Lead-containing space glass, its production and use N2 - The space glass has a composition, in wt. % based on oxide content, of: SiO2, 5-65; B2O3, 0-40; Al2O3, 0-12; PbO, 25-50; Na2O 0-8; K2O, 0-20; Sigma alkali metal oxides, at least 0.25; and at least 0.1 wt. % of a total amount of three or more doping agents selected from CeO2, MoO3, Bi2O3, WO3, Ag2O, SnO2, Sb2O3 and As2O3. In addition, it contains one or more of the following doping agents in the following amounts: at most 1 wt. %, CeO2; at most 0.02 wt. %, As2O3; at most 0.3 wt. %, Sb2O3; and at most 0.5 wt. %, SnO2. Light-weight optical systems for space are made from it, because of its high radiation resistance. A preferred process for making space glass includes melting the oxide starting ingredients at 1050 DEG C. to 1200 DEG C. to form a melt and refining the melt at 1230 DEG C. to 1350 DEG C. KW - glass KW - space KW - satellite KW - Optisches Glas KW - Raumfahrt Y1 - 2013 UR - https://opus4.kobv.de/opus4-h-ab/frontdoor/index/index/docId/548 UR - http://worldwide.espacenet.com/publicationDetails/biblio?CC=US&NR=8431500B2&KC=B2&FT=D&ND=4&date=20130430&DB=EPODOC&locale=en_EP ER -