Abstract:
A method for producing a glass substrate includes (a) a step of forming molten glass having a temperature T2 less than or equal to 1500° C. on molten tin having an iron concentration greater than or equal to 100 ppm to produce a glass ribbon having a temperature T4 less than or equal to 1100° C. and a logarithm log ρ greater than or equal to 8.8, and (b) a step of cooling the glass ribbon to room temperature to produce the glass substrate. The temperature T2 represents a temperature when a logarithm of a viscosity η (dPa·s) is 2, the temperature T4 represents a temperature when the logarithm of the viscosity η (dPa·s) is 4, and the logarithm log ρ represents a logarithm of a volume resistivity ρ (Ω·cm) at 150° C.
Abstract:
The present invention relates to a float glass for chemical strengthening, containing a bottom surface coming into contact with a molten metal at the time of forming and a top surface opposing the bottom surface, in which a difference Δ(N—Na2O2) determined by subtracting a square of a normalized Na2O surface concentration of the bottom surface which is a value obtained by dividing an Na2O concentration in the bottom surface by an Na2O concentration at a depth position of 100 μM therefrom, from a square of a normalized Na2O surface concentration of the top surface which is a value obtained by dividing an Na2O concentration in the top surface by an Na2O concentration at a depth position of 100 μm therefrom, is 0.040 or less.
Abstract:
A front glass plate for a stacked structure includes greater than or equal to 5 mol % of Al2O3, in terms of an oxide, as a component, 50% crack initiation load of the front glass plate being greater than or equal to 0.5 kg.
Abstract translation:叠层结构的前玻璃板包括大于或等于5mol%的Al 2 O 3,以氧化物为成分,前玻璃板的50%裂纹起始载荷大于或等于0.5kg。
Abstract:
A glass for chemical strengthening is a glass plate. The glass plate includes, as represented by mass percentage based on the following oxides, 65 to 72% of SiO2, 3.4 to 8.6% of Al2O3, 3.3 to 6% of MgO, 6.5 to 9% of CaO, 13 to 16% of Na2O, 0 to 1% of K2O, 0 to 0.2% of TiO2, 0.01 to 0.15% of Fe2O3 and 0.02 to 0.4% of SO3. In the glass plate, (Na2O+K2O)/Al2O3 is 1.8 to 5.
Abstract translation:用于化学强化的玻璃是玻璃板。 该玻璃板包含以下列氧化物为基准的质量百分数表示,SiO:65〜72%,Al 2 O 3:3.4〜8.6%,MgO:3.3〜6%,CaO:6.5〜9%,Na 2 O:13〜16% ,0〜1%的K 2 O,0〜0.2%的TiO 2,0.01〜0.15%的Fe 2 O 3和0.02〜0.4%的SO 3。 在玻璃板中,(Na 2 O + K 2 O)/ Al 2 O 3为1.8〜5。