Abstract: A method of manufacturing a glass article includes a forming step of causing a first molten glass (Gm1) including P2O5 to flow down along a surface of a forming trough (15) including an yttrium-containing oxide by a down-draw method to form a glass ribbon (G), wherein the forming trough (15) includes a Mg-rich layer (MR) serving as a diffusion suppression layer for suppressing diffusion of the yttrium-containing oxide on the surface thereof.

Abstract: A tempered glass has a sheet thickness of 0.6 mm or less and having a compression stress layer resulting from chemical tempering at a surface thereof, which satisfies requirements of CS×(DOL?20)/DOL>360 and DOL/t?0.20 when the compression stress value of the compression stress layer is represented by CS (Mpa), the depth of the compression stress layer is represented by DOL (?m), and the sheet thickness is represented by t (?m).

Abstract: A tempered glass sheet (G4) includes a compressive stress layer having a compressive stress on a main surface, and a tensile stress layer having a tensile stress in an inside. The tempered glass sheet (G4) includes: a highly anisotropic stress region (Qa) which is arranged in at least part of an end edge portion, and which has a stress showing anisotropy in a plane parallel to the main surface; and a low anisotropic stress region (Qb) which is arranged on a center side in a main surface direction so as to be adjacent to the highly anisotropic stress region (Qa), and which has a stress showing lower anisotropy than the highly anisotropic stress region (Qa) in the same plane parallel to the main surface.

Abstract: Provided is a tempered glass, including, on a surface thereof, a compressive stress layer having a compressive stress, and including a tensile stress layer having a tensile stress inside the compressive stress layer, wherein the tempered glass satisfies the following expression (1): DZ/DT<0.65 . . . (1) where DZ represents a zero stress depth (?m) indicating a depth from the surface to a reference position at which a stress becomes zero between the compressive stress layer and the tensile stress layer, and DT represents an alkali metal diffusion depth (?m) indicating a depth of a region layer, which has diffused therein an alkali metal ion that causes the compressive stress, from the surface, and wherein the tempered glass satisfies the following expression (2): CTM<73 . . . (2) where CTM represents a maximum tensile stress (MPa).

Abstract: Provided is a method of manufacturing a tempered glass sheet that has been tempered by an ion exchange process, the method including: a film forming step of covering a surface of an original glass sheet with an ion permeation suppressing film configured to suppress permeation of an alkali metal ion, to thereby provide a glass sheet with a film; a processing step of subjecting, after the film forming step, the glass sheet with a film to at least any one of cutting processing, end-surface processing, and hole-opening processing, to thereby provide a glass sheet to be tempered including an exposed portion free from being covered with the ion permeation suppressing film; and a tempering step of chemically tempering, after the processing step, the glass sheet to be tempered by the ion exchange process to provide a tempered glass sheet.

Abstract: A tempered glass sheet (G4) includes a compressive stress layer having a compressive stress on a main surface, and a tensile stress layer having a tensile stress in an inside. The tempered glass sheet (G4) includes: a highly anisotropic stress region (Qa) which is arranged in at least part of an end edge portion, and which has a stress showing anisotropy in a plane parallel to the main surface; and a low anisotropic stress region (Qb) which is arranged on a center side in a main surface direction so as to be adjacent to the highly anisotropic stress region (Qa), and which has a stress showing lower anisotropy than the highly anisotropic stress region (Qa) in the same plane parallel to the main surface.

Abstract: Provided are a glass film layered body and a method for manufacturing a glass film layered body whereby glass film yield and nondefective product rate are enhanced while handling properties of the glass film are enhanced. A method for manufacturing a glass film layered body fabricated by layering a glass film on a support glass, the method provided with an ultrasonic wave application step for applying ultrasonic waves to at least peripheral parts of the glass film and the support glass, a cleaning step for cleaning the glass film and support glass which have undergone the ultrasonic wave application step, and a layering step for layering the glass film on the support glass which has undergone the cleaning step and fabricating a glass film layered body.

Abstract: Provided is a tempered glass, including, on a surface thereof, a compressive stress layer having a compressive stress, and including a tensile stress layer having a tensile stress inside the compressive stress layer, wherein the tempered glass satisfies the following expression (1): DZ/DT<0.65 . . . (1) where DZ represents a zero stress depth (?m) indicating a depth from the surface to a reference position at which a stress becomes zero between the compressive stress layer and the tensile stress layer, and DT represents an alkali metal diffusion depth (?m) indicating a depth of a region layer, which has diffused therein an alkali metal ion that causes the compressive stress, from the surface, and wherein the tempered glass satisfies the following expression (2): CTM<73 . . . (2) where CTM represents a maximum tensile stress (MPa).

Abstract: A tempered glass has a sheet thickness of 0.6 mm or less and having a compression stress layer resulting from chemical tempering at a surface thereof, which satisfies requirements of CS×(DOL?20)/DOL>360 and DOL/t?0.20 when the compression stress value of the compression stress layer is represented by CS (Mpa), the depth of the compression stress layer is represented by DOL (?m), and the sheet thickness is represented by t (?m).

Abstract: Provided is a method of manufacturing a tempered glass sheet that has been tempered by an ion exchange process, the method including: a film forming step of covering a surface of an original glass sheet with an ion permeation suppressing film configured to suppress permeation of an alkali metal ion, to thereby provide a glass sheet with a film; a processing step of subjecting, after the film forming step, the glass sheet with a film to at least any one of cutting processing, end-surface processing, and hole-opening processing, to thereby provide a glass sheet to be tempered including an exposed portion free from being covered with the ion permeation suppressing film; and a tempering step of chemically tempering, after the processing step, the glass sheet to be tempered by the ion exchange process to provide a tempered glass sheet.

Abstract: Provided are a glass film layered body and a method for manufacturing a glass film layered body whereby glass film yield and nondefective product rate are enhanced while handling properties of the glass film are enhanced. A method for manufacturing a glass film layered body fabricated by layering a glass film on a support glass, the method provided with an ultrasonic wave application step for applying ultrasonic waves to at least peripheral parts of the glass film and the support glass, a cleaning step for cleaning the glass film and support glass which have undergone the ultrasonic wave application step, and a layering step for layering the glass film on the support glass which has undergone the cleaning step and fabricating a glass film layered body.