Zerodur

GPTKB entity

Statements (23)
Predicate Object
gptkbp:instanceOf glass-ceramic material
gptkbp:category gptkb:ceramics
optical material
gptkbp:color transparent to yellowish
gptkbp:composition lithium aluminosilicate glass-ceramic
gptkbp:countryOfOrigin gptkb:Germany
gptkbp:density 2.53 g/cm³
gptkbp:developedBy gptkb:Schott_AG
gptkbp:firstProduced 1968
https://www.w3.org/2000/01/rdf-schema#label Zerodur
gptkbp:manufacturer gptkb:Schott_AG
gptkbp:notableFor high dimensional stability
very low thermal expansion
gptkbp:thermalExpansionCoefficient 0 ± 0.007 × 10⁻⁶/K
gptkbp:usedFor precision optics
metrology equipment
telescope mirrors
gptkbp:usedIn gptkb:Gran_Telescopio_Canarias_mirrors
gptkb:Keck_Observatory_mirrors
Very Large Telescope mirrors
gptkbp:bfsParent gptkb:Gran_Telescopio_Canarias
gptkb:Very_Large_Telescope
gptkbp:bfsLayer 5