GLASS FOR COATING ALUMINA SUBSTRATE

PURPOSE:To form lead- and alkali-free amorphous glass having a moderate coefft. of thermal expansion and suitable for use in the formation of a glaze film having high surface smoothness, by blending SiO2 with Al2O3, ZnO, BaO and SrO in a specified ratio. CONSTITUTION:This glass for coating an alumin...

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Hauptverfasser:	HORIBE YOSHIYUKI, ONO RIICHI, UEHARA HIDEAKI, KAMIYAMA MAMORU, YABUKI TAKAYOSHI
Format:	Patent
Sprache:	eng
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:	PURPOSE:To form lead- and alkali-free amorphous glass having a moderate coefft. of thermal expansion and suitable for use in the formation of a glaze film having high surface smoothness, by blending SiO2 with Al2O3, ZnO, BaO and SrO in a specified ratio. CONSTITUTION:This glass for coating an alumina substrate has a compsn. consisting of, by mol, 50-70% SiO2, 1-20% Al2O3, 1.5-10% ZnO and 20-30% BaO+SrO. In the compsn., the ratio of Al2O3 to SiO2 is