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Lead-containing space glass, its production and use

  • 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.

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Metadaten
Author:Burkard Speit, Thorsten DöhringORCiD, Silke Wolff
URL:http://worldwide.espacenet.com/publicationDetails/biblio?CC=US&NR=8431500B2&KC=B2&FT=D&ND=4&date=20130430&DB=EPODOC&locale=en_EP
Document Type:Patent
Language:English
Year of Completion:2013
Contributing Corporation:SCHOTT AG
Release Date:2015/04/21
Tag:glass; satellite; space
GND Keyword:Optisches Glas; Raumfahrt
Urheberrecht:0
Patentnummer:US8431500 (B2)
Patentnummer:US2010323874 (A1)
Land der Patentanmeldung:USA
research focus :Materials / Innovative Material Processing
Materials / Material Testing & Sensor Technology
Licence (German):Keine Lizenz - es gilt das deutsche Urheberrecht
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