GLASS PLATE AND TEMPERING METHOD FOR GLASS PLATE

PROBLEM TO BE SOLVED: To provide a glass plate which is easily tempered even in the case of a plate thickness of the order of 2-3 mm, and a tempering method for glass plate. SOLUTION: In this tempering method for glass plate having 2-3 mm thickness, the average linear thermal expansion coefficient i...

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Bibliographische Detailangaben
Hauptverfasser:	AKATA SHUICHI, YODA KAZUNARI, KATO YASUZANE
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES 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 a glass plate which is easily tempered even in the case of a plate thickness of the order of 2-3 mm, and a tempering method for glass plate. SOLUTION: In this tempering method for glass plate having 2-3 mm thickness, the average linear thermal expansion coefficient in 50-300°C is ≥88×10-7/°C and the softening point is 715-740°C. Therein, the glass plate is cooled from a cooling starting temperature at which the viscosity is in the range of 109-1010poise to a temperature at which the viscosity comes to 1012poise in such a manner that the heat transfer coefficient h (W/m2K) satisfies the following inequalities (1) or (2), wherein, t (mm) denotes the thickness of glass plate: h>4970.5-3149.9t+550.3t2...(1), h>2123.6t-1.4641...(2). COPYRIGHT: (C)2003,JPO