Lithium-aluminosilicate glass ceramic with high keatite content and structural member made thereof

A lithium-aluminosilicate glass ceramic is transformed by a suitable heat treatment into a glass ceramic comprising at least 80 vol.-% of keatite mixed crystals. This may be utilized for the preparation of optical or mechanical high-precision parts having a high temperature resistance, a good stabil...

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Bibliographische Detailangaben
Hauptverfasser: HOELZEL EVA, MITRA INA, DOEHRING THORSTEN, ESEMANN HAUKE, JEDAMZIK RALF
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A lithium-aluminosilicate glass ceramic is transformed by a suitable heat treatment into a glass ceramic comprising at least 80 vol.-% of keatite mixed crystals. This may be utilized for the preparation of optical or mechanical high-precision parts having a high temperature resistance, a good stability and compatibility with components consisting of metals having a small coefficient of thermal expansion based on nickel and iron, such as Invar(R).