A method of making a glass sheet (10) comprises laminating a high CTE core glass (11) to a low CTE clad glass (12) at high temperatures and allowing the laminate (10) to cool creating compressive stress in the clad glass (12), and then ion exchanging the laminate (10) to increase the compressive stress in the outer near surface regions of the clad glass (12). The core glass (11) may include ions that exchange with ion in the clad glass (12) to increase the compressive stress in inner surface regions of the clad glass (12) adjacent to the clad glass/core glass interfaces. The glass laminate (10) may be formed and laminated using a fusion forming and laminating process and fusion formable and ion exchangeable glass compositions.

Laminated and ion-exchanged strengthened glass laminates

Glass compositions and glass articles comprising the glass compositions are disclosed. In one embodiment, a glass composition includes from about 65 mol.% to about 70 mol.% SiO2; from about 9 mol.% to about 14 mol.% Al2O3; and from about 0 mol.% to about 11 mol.% B2O3 as glass network formers. The glass composition also includes from about 5 mol.% to less than 10 mol.% alkali oxide R2O, wherein R is at least one of Li, Na, and K. The glass composition also includes from about 3 mol.% to about 11 mol.% of divalent oxide MO, wherein M is at least one of Mg, Ca, Ba, SrO and Zn. The glass composition has a coefficient of thermal expansion which is less than or equal to 55x10-7/°C and is amenable to strengthening by ion-exchange. The glass composition is well suited for use as the glass cladding layers of a laminated glass article.

Low cte, ion-exchangeable glass compositions and glass articles comprising the same

A flexible display device includes a display panel including a first surface including a display area configured to display an image, and a second surface disposed on the opposite side of the display panel from the first surface, and a touch panel disposed on the first surface, the touch panel including a base film and a transparent conductive layer disposed on a surface of the base film facing the display panel, in which at least a portion of each of the display panel and the touch panel is bendable such that centers of curvature of the display panel and the touch panel are positioned outside the second surface.

Flexible display device with touch panel

The invention belongs to the technical field of mobile phone accessories, and specifically relates to a production method of 3D glass cover plates of mobile phones. The production method of 3D glass cover plates of mobile phones includes the steps: engineering, cutting, fine carving, grinding and polishing, cleaning, double face sweeping, primary detection, chemical strengthening, secondary detection, UV transfer printing, film plating and the other steps. The production method of 3D glass cover plates of mobile phones utilizes an ultrasonic cleaning machine to clean the residues on the glasssurface, thus being clearer in cleaning effect, being higher in the cleaning speed and improving the production efficiency.

Production method of 3D glass cover plates of mobile phones

Methods for regenerating poisoned salt bath comprising providing a salt bath comprising at least one of KNO 3 and NaNO 3 , providing an ion-exchangeable substrate comprising lithium cations, contacting at least a portion of the ion-exchangeable substrate with the salt bath, whereby lithium cations in the salt bath diffuse from the ion-exchangeable substrate and are dissolved in the salt bath, and selectively precipitating dissolved lithium cations from the salt bath using phosphate salt The methods further include preventing or reducing the formation of surface defects in the ion-exchangeable substrate by preventing or reducing the formation of crystals on the surface of the ion-exchangeable substrate upon removal from the salt bath

Methods for regenerating lithium-enriched salt baths

The present invention pertains to a reinforced glass article provided with a reinforced glass plate having a compressive stress layer on a main surface and a tensile stress layer on an end surface. The arithmetic average roughness Ra of the end surface of the reinforced glass plate is Ra ≤ 3µm. A protective layer is provided on the end surface. If the maximum thickness of the protective layer is defined as T1 and the thickness of the reinforced glass plate as T0, 50µm < T1 ≤ 2T0 is satisfied.

Reinforced glass article and touch sensor integrated-type cover glass

A method for manufacturing chemically reinforced glass, including a step for bringing glass including sodium into contact with an inorganic salt including potassium nitrate, thereby performing ion exchange between Na in the glass and K in the inorganic salt, the method for manufacturing chemically reinforced glass wherein the inorganic salt includes at least one species of salt selected from the group consisting of K2CO3, Na2CO3, KHCO3, NaHCO3, K3PO4, Na3PO4, K2SO4, Na2SO4, KOH, and NaOH, and the method includes a step for cleaning the glass after the ion exchange, a step for acid-treating the glass after the cleaning, and a step for alkali-treating the glass after the acid treatment.

Method for manufacturing chemically reinforced glass

A chemically strengthened glass having a compressive stress layer formed in a surface layer thereof according to an ion exchange method, in which the glass has a surface roughness (Ra) of 0.20 nm or higher, a hydrogen concentration Y in a region to a depth X from an outermost surface of the glass satisfies the following relational equation (I) at X=from 0.1 to 0.4 (μm), a surface strength F (N) measured by a ball-on-ring test under the following conditions is (F≧1500×t2) relative to a sheet thickness t (mm) of the glass, and a surface of the glass has no polishing flaw: Y=aX+b (I) in which meanings of respective symbols in the equation (I) are as follows: Y: hydrogen concentration (as H2O, mol/L); X: depth from the outermost surface of the glass (μm); a: −0.270 to −0.005; and b: 0.020 to 0.220.

Chemically strengthened glass

A method for producing a chemically strengthened glass, including a step of bringing a glass containing sodium into contact with an inorganic salt containing potassium nitrate, thereby performing ion exchange of a Na ion in the glass with a K ion in the inorganic salt, in which the inorganic salt contains at least one salt selected from the group consisting of K 2 CO 3 , Na 2 CO 3 , KHCO 3 , NaHCO 3 , K 3 PO 4 , Na 3 PO 4 , K 2 SO 4 , Na 2 SO 4 , KOH and NaOH, and the method includes: a step of washing the glass after the ion exchange; a step of subjecting the glass to an acid treatment after the washing; and a step of subjecting the glass to an alkali treatment after the acid treatment.

Method for producing chemically strengthened glass

An object of the present invention is to provide a chemically strengthened glass having enhanced surface strength and bending strength. The present invention relates to a chemically strengthened glass having a compressive stress layer formed on a surface layer thereof by an ion exchange method, in which a straight line obtained by a linear approximation of a hydrogen concentration Y in a region of a depth X from an outermost surface of the glass satisfies a specific relational equation (I) in X=0.1 to 0.4 (μm), and an edge surface connecting main surfaces on a front side and a back side of the glass has a skewness (Rsk) measured based on JIS B0601 (2001) being −1.3 or more.

Kiyoshi Tamai

Papers

Reinforced glass article and touch sensor integrated-type cover glass

Method for manufacturing chemically reinforced glass

Chemically strengthened glass

Method for producing chemically strengthened glass

Chemically strengthened glass and production method for same