GLASS FOR SUBSTRATE

PROBLEM TO BE SOLVED: To provide glass for substrate which exhibits small shrinkage even when a heat treatment is carried out at ≥570°C and has 75-95×10-7/°C coefficient of thermal expansion, higher volume resistivity as compared with soda lime glass, and excellent chemical durability. SOLUTION: The...

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Hauptverfasser:	MIWA YOSHIHARU, WAKAGI JUNZO, ASAHI KAZUHIKO
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:	PROBLEM TO BE SOLVED: To provide glass for substrate which exhibits small shrinkage even when a heat treatment is carried out at ≥570°C and has 75-95×10-7/°C coefficient of thermal expansion, higher volume resistivity as compared with soda lime glass, and excellent chemical durability. SOLUTION: The glass for substrate has a composition of 50-65% SiO2, 2-15% Al2O3, 0-4% MgO, 0-2.9% CaO, 2-13% SrO, 2-13% BaO, 17-27% MgO+CaO+SrO+BaO, 0-1% Li2O, 2-10% Na2O, 2-13% K2O, 7-15% Li2O+Na2O+K2O, 1-9%ZrO2, 0-5% TiO2, 0-1% Sb2O3and 0-1% As2O3by weight and has 75-95×10-7/°C thermal expansion at 30-380°C. COPYRIGHT: (C)2005,JPO&NCIPI