The present invention discloses an aluminosilicate glass composition, aluminosilicate glass and a preparation method therefor and application thereof. Based on the total molar weight of the aluminosilicate glass composition, the aluminosilicate glass composition comprises, by oxide, 67-74 mol % of SiO.sub.2, 10-15 mol % of Al.sub.2O.sub.3, 0-5 mol % of B.sub.2O.sub.3, 1-10 mol % of MgO, 1-10 mol % of CaO, 0-3 mol % of SrO, 2-8 mol % of BaO, 0.1-4 mol % of ZnO, 0.1-4 mol % of RE.sub.2O.sub.3 and less than 0.05 mol % of R.sub.2O, wherein RE represents rare earth elements, and R represents alkali metals.

Thin glass elements with improved edge strength are providedfrom a sheet glass element that has two opposite parallel faces and an edge connecting the faces. The sheet glass element has a thickness of at most 700 ?m. At least a portion of the edge is defined by an edge surface portion that is convexly curved, so that at least one of the faces merges into the edge surface portion, wherein a curved arc of the edge surface portion has a length that is at least 1/30 of the thickness of the sheet glass element. In the region of the convex curvature, the edge surface portion has indentations in the form of furrows.

A method of of fining low-density submerged combustion glass includes introducing unfined molten glass produced in a submerged combustion melter into a fining chamber of a fining tank and, further, introducing additive particles into the fining chamber that comprise a glass reactant material and one or more fining agents. The one or more fining agents are released into the molten glass bath upon consumption of the additive particles in the molten glass bath to chemically fine the molten glass bath and the glass reactant material includes one or more materials that integrate into the molten glass bath upon melting. Additionally, the method includes discharging fined molten glass out of the fining chamber of the fining tank. The discharged fined molten glass has a volume percentage of gas bubbles that is less than the volume percentage of gas bubbles in the unfined molten glass introduced into the fining chamber.

Thin glass elements with improved edge strength are providedfrom a sheet glass element that has two opposite parallel faces and an edge connecting the faces. The sheet glass element has a thickness of at most 700 ?m. At least a portion of the edge is defined by an edge surface portion that is convexly curved, so that at least one of the faces merges into the edge surface portion, wherein a curved arc of the edge surface portion has a length that is at least 1/30 of the thickness of the sheet glass element. In the region of the convex curvature, the edge surface portion has indentations in the form of furrows.

A method for producing a glass article having high hydrolytic resistance is provided. A glass tube consisting of borosilicate glass and having an Al.sub.2O.sub.3 content of less than 1 weight-%, a ZrO.sub.2 content of 2-12 weight-%, and a glass transition temperature T.sub.g is reshaped into a glass article and is subsequently subjected to a thermal post-treatment. To reduce the alkali release of the glass article, the glass article is subjected to a treatment temperature of T.sub.BT.sub.g+5 K over a treatment time of t.sub.B5 min and is subsequently cooled during the thermal post-treatment.

A process and apparatus for manufacturing glass. A mixture of solid glass-forming materials comprising at least one fining agent are introduced into a doghouse located upstream of an elongated tank. The glass-forming materials are melted in the doghouse at a temperature at or above a fining-onset temperature of the at least one fining agent by application of heat from one or more submerged combustion burners. The resulting molten glass is relatively foamy and may comprise greater than 25 vol. % gas bubbles. The molten glass is directed from the doghouse into an upstream end of the tank where it is refined to produce molten glass having on average less than 20 seeds per ounce.

Embodiments relate to a green glass composition, which can reduce the cooling load of a building and a vehicle by effectively lowering solar heat ray and ultraviolet ray transmittance while ensuring a high visible light transmittance suitable for window glass without using a coloring agent such as Ce, Co and Cr, and also has excellent bubble quality; green glass manufactured therefrom; and a method for manufacturing green glass. According to at least one embodiment, there is provided a green glass composition including 0.65-1.3 wt % of Fe.sub.2O.sub.3, 0.1-0.4 wt % of TiO.sub.2, and 0.05-0.20 wt % of SO.sub.3, based on 100 wt % of a soda lime mother glass composition, wherein an oxidation-reduction ratio of Fe.sub.2O.sub.3 is 0.22 to 0.38.

Thin glass elements with improved edge strength are providedfrom a sheet glass element that has two opposite parallel faces and an edge connecting the faces. The sheet glass element has a thickness of at most 700 ?m. At least a portion of the edge is defined by an edge surface portion that is convexly curved, so that at least one of the faces merges into the edge surface portion, wherein a curved arc of the edge surface portion has a length that is at least 1/30 of the thickness of the sheet glass element. In the region of the convex curvature, the edge surface portion has indentations in the form of furrows.

A transparent, chemically prestressable or chemically prestressed glass ceramic is provided. The glass ceramic has keatite as a main crystal phase, a transmittance greater than 80% at a thickness of 0.7 mm, a haze of less than or equal to 10, and a crystal phase content of at least 80% by weight of keatite solid solution based on all crystal phases in the glass ceramic.

Laminated glass articles and methods for making the same are disclosed. In one embodiment, a laminated glass article may include a glass core layer and at least one glass cladding layer fused to the glass core layer. The at least one glass cladding layer may be phase separated into a first phase and at least one second phase having different compositions. The first phase of the at least one glass cladding layer may have an interconnected matrix. The at least one second phase of the at least one glass cladding layer may be dispersed throughout the interconnected matrix of the first phase of the at least one glass cladding layer. In some embodiments, the at least one second phase may be selectively removed from the interconnected matrix leaving a porous, interconnected matrix of the first phase.