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The Birth – and Growth – of Glass Ceramics

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Lynn Savage, Features Editor, [email protected]

When glass ceramics were first created in the 1950s, these novel optical materials rightfully caused a stir, and they remain widely desired today for a range of semiconductor, military sensing and astronomy applications. Glass ceramics are polycrystalline materials that share attributes of both standard glass and ceramics. Made of a variety of aluminosilicates, they offer the advantages of ceramics – low defects, extra hardness, extremely high thermal resistance – with the ease of fabrication and molding of glass. No matter what formulation a glassmaker chooses for its...Read full article

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    Published: October 2011
    Glossary
    astronomy
    The scientific observation of celestial radiation that has reached the vicinity of Earth, and the interpretation of these observations to determine the characteristics of the extraterrestrial bodies and phenomena that have emitted the radiation.
    hardness
    In the most general sense, the resistance of a solid surface to damage.
    thermal resistance
    In a laser, a measure of the device's ability to dissipate internally generated heat.
    transparency
    An image affixed to a transparent photographic film or plate by photographic, printing or chemical methods. It may be viewed by transmitted light.
    zerodur
    Schott Glass Technologies' trade name for a glass-ceramic material with a very low coefficient of thermal expansion.
    ALONaluminosilicatesastronomyBasic ScienceCAOClearceramCorningdefenseFeaturesGermanyglass ceramicsHans ElsässerhardnesshomogeneityIC lithographyindustrialinfrared domesinfrared vision systemsinterferometersJürgen PetzoldK2OLAS systemLCD lithographyLee GoldmanlensesLight Sourceslithium disilicateMAS systemMassachusettsmicamilitary applicationsmirror substratesmirrorsN.J.Na2ONew YorkOhara Corp.OpticsphlogopitePhotonic Component Mfg. Equip.Photonics Component Mfg. Equip.RaytheonSchott AGSurmet Corp.thermal resistanceThomas WesterhofftransparencyULEUniversity of HeidelbergVery Large TelescopeWafersZAS systemZerodur

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