Glass Ceramic Zerodur

Zerodur is an inorganic non porous lithium aluminum silicon oxide glass ceramic characterized by evenly distributed nano crystals within a residual glass phase.

Glass ceramic zerodur. It contains a crystallized phase and a rest glass phase which creates the unique properties of this exceptional material. Additionally you can find video footage material and images of zerodur r glass ceramic here. Borosilicate glass once invented by the glass pioneer otto schott and today supplied by several glass companies worldwide is the industry s gold standard to package pharmaceutical drugs. Schott offers zerodur as small finished components ultra light weight mirror substrates but also as mirror substrates for large segmented and monolithic astronomical telescopes.

äußerst niedriger thermischer ausdehnungskoeffizient coefficient of thermal expansion cte über einen großen temperaturbereich. Hervorragende cte homogenität über das gesamtvolumen. Zerodur notation of the manufacturer. Zerodur is a zero expansion glass ceramic with extraordinary properties for demanding applications in which geometrical shape and distance changes must be kept as small as possible during changes in temperature.

The material is white in color and offers good infrared ir transmittance between 3 5 and 5 μm and homogeneous high reflectivity properties. Press release may 30 2017 schott wins major contract to produce mirror substrates for the world s largest telescope. Zerodur is an inorganic glass ceramic with 70 to 78 of high quartz micro crystallites 50 to 80 nm in size embed ded in a remaining glassy phase. Zerodur die glaskeramik mit extrem niedriger thermischer ausdehnung hat zahlreiche außergewöhnliche eigenschaften.

It has been used for a number of very large telescope mirrors including gtc keck i keck ii and sofia as well as some smaller telescopes such as the gregor solar telescope. The key properties of zerodur are. An extremely low coefficient of thermal expansion cte for a wide range of temperatures. Zerodur a registered trademark of schott ag is a lithium aluminosilicate glass ceramic produced by schott ag since 1968.

This remarkable property is useful where precision parts will face wide thermal conditions in application. Zerodur is a glass ceramic made by schott glass that is designed and formulated to exhibit essentially zero thermal expansion over a wide temperature range. Zerodur glass block. If you need further assistance please don t hesitate to contact us.