TRANSPARENT GLASS-CERAMIC ARTICLES HAVING IMPROVED MECHANICAL DURABILITY

A glass-ceramic article includes: from 40 wt % to 60 wt % SiO2; from 18 wt % to 35 wt % Al2O3; from 12 wt % to 16 wt % B2O3; from 0 wt % to 4 wt % Li2O; from 0 wt % to 5 wt % Na2O; from 0 wt % to 5 wt % K2O; from 0 wt % to 15 wt % ZnO; and from 0 wt % to 8 wt % MgO. The sum of Li2O and Na2O in the g...

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Bibliographische Detailangaben
Hauptverfasser:	BEALL, George Halsey, FINKELDEY, John Philip
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Beschreibung
Zusammenfassung:	A glass-ceramic article includes: from 40 wt % to 60 wt % SiO2; from 18 wt % to 35 wt % Al2O3; from 12 wt % to 16 wt % B2O3; from 0 wt % to 4 wt % Li2O; from 0 wt % to 5 wt % Na2O; from 0 wt % to 5 wt % K2O; from 0 wt % to 15 wt % ZnO; and from 0 wt % to 8 wt % MgO. The sum of Li2O and Na2O in the glass-ceramic article may be from 1 wt % to 8 wt %. The sum of MgO and ZnO in the glass-ceramic article may be from 3 wt % to 20 wt %. A predominate crystalline phase of the glass-ceramic article may comprise a mullite-type structure.