The present invention relates to a chemically strengthened glass ceramic including a crystalline phase, having two main surfaces opposed to each other, and including an amorphized region in a surface layer of at least one of the main surfaces and a crystallized region inside the glass, in which the amorphized region has a crystallinity of 10 vol % or less at a depth of 100 nm from an outermost surface of the glass.

A colored glass article includes greater than or equal to 50 mol % and less than or equal to 80 mol % SiO.sub.2; greater than or equal to 7 mol % and less than or equal to 25 mol % Al.sub.2O.sub.3; greater than or equal to 1 mol % and less than or equal to 15 mol % B.sub.2O.sub.3; greater than or equal to 5 mol % and less than or equal to 20 mol % Li.sub.2O; greater than or equal to 0.5 mol % and less than or equal to 15 mol % Na.sub.2O; greater than 0 mol % and less than or equal to 1 mol % K.sub.2O; and greater than or equal to 1×10.sup.−6 mol % and less than or equal to 1 mol % Au. R.sub.2O—Al.sub.2O.sub.3 is greater than or equal to −5 mol % and less than or equal to 7 mol %, R.sub.2O being the sum of Li.sub.2O, Na.sub.2O, and K.sub.2O.

A chemically toughenable or toughened sheet-like glass article is provided. The article has a glass with a composition comprising Al.sub.2O.sub.3, SiO.sub.2, Li.sub.2O, and Na.sub.2O, wherein (Al.sub.2O.sub.3)−(Li.sub.2O+Na.sub.2O), in mol %, is less than 0; a thickness between 0.3 mm and 4 mm; a light transmittance of at least 0.001% to at most 60% at 450 nm, of at least 0.001% to at most 30% at 540 nm, and of at least 0.001% to at most 30% at 630 nm; and an IR transmittance of at least 10% to not more than 99% at any wavelength in a wavelength range from 900 nm to 1100 nm. The light and IR transmittances are determined for a thickness of the article of 1 mm.

The present invention relates to a glass including, in terms of mole percentage based on oxides: 52% to 70% of SiO.sub.2; 14% to 25% of Al.sub.2O.sub.3; 10% to 18% of Li.sub.2O; 1% to 7% of Na.sub.2O; 0.1% to 5% of K.sub.2O; 0% to 10% of B.sub.2O.sub.3; 0% to 5% of P.sub.2O.sub.5; 0% to 5% of MgO; 0% to 5% of ZnO; 0% to 2% of ZrO.sub.2; and 0% to 5% of Y.sub.2O.sub.3, in which a parameter M is 20 or less, the parameter M being determined by the following formula, M=−1.15×[SiO.sub.2]−1.73×[Al.sub.2O.sub.3]+0.155×[Li.sub.2O]+0.74×[Na.sub.2O]−4.75×[K.sub.2O]−2.1×[B.sub.2O.sub.3]−2.17×[P.sub.2O.sub.5]+3.25×[MgO]−2.0×[ZnO]−13.3×[ZrO.sub.2]−0.80×[Y.sub.2O.sub.3]+120.

The purpose of the present invention is to provide a chemically strengthened glass in which reduction in glass surface strength is effectively suppressed even without performing a polishing treatment after a prolonged chemical strengthening treatment has been conducted at a high temperature. The present invention relates to a chemically strengthened glass having a specific glass composition, wherein: the surface roughness (Ra) is a specific value or greater; the compressive stress layer depth of a surface layer is a specific value or greater; by setting the hydrogen concentration in the glass surface layer to be within a specific range, the surface strength of the glass is dramatically improved even without performing an etching treatment using hydrofluoric acid or polishing the glass surface after a prolonged chemical strengthening treatment has been conducted at a high temperature.

A toughenable glass article includes a glass and has a thickness of less than 100 μm and a cooling state which is such that, after chemical toughening to a depth of 30% of the thickness, the glass article has a relative thermal length change potential in a range from −1500 ppm to ≤0 ppm.

The present invention discloses a glass material, and a preparation method and a product thereof. The glass material contains a lithium salt crystalline phase and a phosphate crystalline phase. For the entire material, the crystallinity is 40-95%, the lithium salt crystalline phase accounts for 40-90 wt % of the entire material, and the phosphate crystalline phase accounts for 2-15 wt % of the entire material, wherein the lithium salt crystalline phase is one or more of lithium silicate, lithium disilicate and petalite, and the phosphate crystalline phase is aluminum phosphate or/and aluminum metaphosphate. After the glass material of the present invention is toughened, the Vickers hardness (Hv) is 900 kgf/mm.sup.2 or above. The glass material or a substrate of the present invention is suitable for protective members such as mobile terminal equipment and optical equipment and has high hardness and strength. Furthermore, the present invention may also be used for other decorations such as outer frame members of portable electronic equipment.

Disclosed are a flexible cover window and a method of manufacturing the same. A glass-based flexible cover window includes planar portions formed so as to correspond to planar regions of a flexible display and a folding portion formed so as to be connected to the planar portions, the folding portion being formed so as to correspond to a folding region of the flexible display, the folding portion having a smaller thickness than each of the planar portions, wherein the flexible cover window includes a glass substrate and a shock compensation pattern unit formed on the glass substrate, the shock compensation pattern unit is formed at each of the planar portions and the folding portion, and the shock compensation pattern unit has cylindrical patterns.

Disclosed are a flexible cover window and a method of manufacturing the same. A glass-based flexible cover window includes planar portions formed so as to correspond to planar regions of a flexible display and a folding portion formed so as to be connected to the planar portions, the folding portion being formed so as to correspond to a folding region of the flexible display, the folding portion having a smaller thickness than each of the planar portions, wherein the flexible cover window includes a glass substrate and a shock compensation pattern unit formed on the glass substrate, the shock compensation pattern unit is formed at each of the planar portions and the folding portion, and the shock compensation pattern unit has cylindrical patterns.

A glass article includes lithium alumino-silicate (“LAS”), a first surface, a second surface opposed to the first surface, a first compressive region extended from the first surface to a first compression depth, a second compressive region extended from the second surface to a second compression depth, and a tensile region disposed between the first compression depth and the second compression depth, wherein a stress profile in the first compressive region comprises a first segment provided between the first surface and a first transition point and a second segment provided between the first transition point and the first compression depth, and wherein a ratio of a stress at the first transition point to a stress at the first surface ranges from 0.22 to 0.47.