ALKALI-FREE GLASS AND GLASS SHEET

An alkali-free glass, includes, as represented by mol % based on oxides: 50% to 76% of SiO2; 2% to 6% of Al2O3; 18% to 35% of B2O3; 1% to 3.5% of MgO; 0.5% to 4% of CaO; 1% to 4.5% of SrO; and 0% to 3% of BaO, in which an expression (A) is [MgO]+[CaO]+[SrO]+[BaO], and a value of the expression (A) i...

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Bibliographische Detailangaben
Hauptverfasser:	TOKUNAGA, Hirofumi, HAMADA, Yuya
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:	An alkali-free glass, includes, as represented by mol % based on oxides: 50% to 76% of SiO2; 2% to 6% of Al2O3; 18% to 35% of B2O3; 1% to 3.5% of MgO; 0.5% to 4% of CaO; 1% to 4.5% of SrO; and 0% to 3% of BaO, in which an expression (A) is [MgO]+[CaO]+[SrO]+[BaO], and a value of the expression (A) is 3.5 to 6, an expression (B) is [Al2O3]-([MgO]+[CaO]+[SrO]+[BaO]), and a value of the expression (B) is −2 to 2, an expression (J) is ([MgO]+[CaO])/([MgO]+[CaO]+[SrO]+[BaO]), and a value of the expression (J) is 0.2 to 0.7, and Δβ-OH is 0 mm−1 to 0.1 mm−1.