GLASS WITH PREFERABLY INCREASED STORABLE TENSILE STRESS, CHEMICALLY TOUGHENED GLASS ARTICLE WITH PREFERABLY INCREASED STORABLE TENSILE STRESS, METHOD FOR PRODUCING SUCH GLASS, AND USE THEREOF

Chemically toughened glass is provided that has a depth of compressive stress for potassium of at least 4 μm and at most 8 μm; a compressive stress at a depth of 30 μm due to sodium exchange of at most 200 MPa and a minimum amount of at least 90 MPa where the thickness is 0.5 mm, at least 100 MPa where the thickness is 0.55 mm, at least 110 MPa in where the thickness is 0.6 mm, at least 120 MPa where the thickness is 0.7 mm, and at least 140 MPa where the thickness is 1 mm; a ratio of sodium exchange depth, in μm, to the thickness, in mm, that is greater than 0.130; and a normalized integral of tensile stress that is a storable tensile stress of at least 20.6 MPa and at most 30 MPa. 1. A chemically toughened sheet-like glass article , comprising:a thickness between at least 0.4 mm and at most 3 mm;a depth of compressive stress for potassium of at least 4 μm and at most 8 μm;a compressive stress at a depth of 30 μm due to sodium exchange of at most 200 MPa and a minimum amount selected from a group consisting of at least 90 MPa where the thickness is 0.5 mm, at least 100 MPa where the thickness is 0.55 mm, at least 110 MPa in where the thickness is 0.6 mm, at least 120 MPa where the thickness is 0.7 mm, and at least 140 MPa where the thickness is 1 mm;a ratio of sodium exchange depth, in μm, to the thickness, in mm, that is greater than 0.130; anda normalized integral of tensile stress that is a storable tensile stress of at least 20.6 MPa and at most 30 MPa.2. The glass article of claim 1 , wherein the normalized integral of tensile stress is at most 27.5 MPa.3. The glass article of claim 1 , wherein the normalized integral of tensile stress is at most 25 MPa.4. The glass article of claim 1 , wherein the normalized integral of tensile stress is at most 24 MPa.5. The glass article of claim 1 , comprising a glass composition claim 1 , in wt % claim 1 , of:{'sub': '2', 'SiO54 to 64;'}{'sub': 2', '3, 'AlO16 to 28;'}{'sub': 2', '3, 'BO0 to 0.6;'}{'sub': '2', 'LiO 3.5 to ...

Thin glass substrate, in particular a borosilicate glass thin glass substrate, method and apparatus for its production

Thin glass substrates are provided. Also provided are methods and apparatuses for the production thereof and provides a thin glass substrate of improved optical quality. The method includes, after the melting and before a hot forming process, adjusting the viscosity of the glass that is to be formed or has at least partially been formed is in a defined manner for the thin glass substrate to be obtained. The apparatus includes a device for melting, a device for hot forming, and also a device for defined adjustment of the viscosity of the glass to be formed into a thin glass substrate, and the device for defined adjustment of the viscosity of the glass to be formed into a thin glass substrate is arranged upstream of the device for hot forming.

COMPOSITE GLASS PANE

A laminated glass pane is provided that includes a first glass sheet, a polymeric layer having a thickness between at least 0.5 mm and at most 1.7 mm, and a second inner glass sheet which has a thickness of at least 0.3 mm and at most 1.5 mm and is made of a lithium aluminum silicate glass. The polymeric layer is disposed between the at least two glass sheets. Furthermore, the glasses of the first and the second glass sheets are matched so that the temperatures at which the two glasses of the first and second glass sheets have the same viscosity in the viscosity range between 10dPa·s and 10dPa·s differ from each other only by a maximum of 50° C. 1. A laminated glass pane , comprising:a first glass sheet;a second glass sheet having a thickness between at least 0.3 mm and at most 1.5 mm, the second glass sheet being made of a lithium aluminum silicate glass; anda polymeric layer having a thickness between at least 0.5 mm and at most 1.7 mm, the polymeric layer between and bonding the first and second glass sheets to one another,{'sup': 7', '10, 'wherein the first and second glass sheets comprise glasses that, in a viscosity range between 10dPa·s and 10dPa·s, are matched so that temperatures at which the first and second glass sheets have a same viscosity only differ from each other by not more than 50° C.'}2. The laminated glass pane of claim 1 , wherein the temperatures differ by not more than 10° C.3. The laminated glass pane of claim 1 , wherein the lithium aluminum silicate glass exhibits a Young's modulus of at least 80 GPa.4. The laminated glass pane of claim 3 , wherein the Young's modulus is at least 84 GPa.5. The laminated glass pane of claim 1 , wherein the second glass sheet is a chemically toughened glass sheet having a compressive stress zone with a depth of at least 40 μm and a compressive stress of at least 150 MPa and at most 900 MPa.6. The laminated glass pane of claim 5 , wherein the compressive stress is at most 600 MPa.7. The laminated glass pane ...

THIN GLASS SUBSTRATE, METHOD AND APPARATUS FOR ITS PRODUCTION

A thin glass substrate, as well as a method and an apparatus are provided. The glass substrate has a glass having first and second main surfaces and elongated elevations on one of the main surfaces. The elevations rise in a normal direction, have a longitudinal extent that is greater than two times a transverse extent, and have a height, on average, that is less than 100 nm, and with a transverse extent of the elevation smaller than 40 mm. The method includes melting a glass, hot forming the glass, and adjusting a viscosity of the glass so that for the viscosity θ1 for a first stretch over a first distance of up to 1.5 m downstream of a flow rate control component and y1 indicating a second distance to a location immediately downstream the flow rate control component the equation lg η1(y1)/dPa·s=(lg η01/dPa·s+a1(y1)) applies. 1. A method for producing a thin glass substrate , comprising:melting a glass; and {'br': None, 'i': y', 'y, 'lg η1(1)/dPa·s=(lg η01/dPa·s+a1(1))'}, 'hot forming the glass into the thin glass sheet, wherein after the melting step and prior to hot forming or after partially hot forming, the method further comprises the step of adjusting a viscosity of the glass so that for the viscosity η1 for a first stretch over a first distance of up to 1.5 m downstream of a flow rate control component of the glass stream and y1 indicating a second distance to a location immediately downstream the flow rate control component the following equation applieswith 0 m≤y1≤1.5 m3.75 lg η01/dPa·s≤4.5a1(y1)=1.00/m*y1.2. The method of claim 1 , wherein the step of adjusting the viscosity comprises adjusting upstream of an inlet lip before the glass is delivered onto a metal bath.3. The method of claim 1 , wherein the step of adjusting the viscosity comprises adjusting the viscosity upstream of the flow rate control component before the glass is delivered onto a metal bath.4. The method of claim 1 , wherein the step of adjusting the viscosity comprises adjusting to a ...

Float glass pane and process for producing a float glass pane

Floatglasscheibe (1) aus einem chemisch vorspannbaren Glas (2), wobei die Glasscheibe (1) eine Scheibendicke von 0,25 mm bis 1,5 mm aufweist, wobei die Differenz der fiktiven Temperatur zweier Ebenen (10, 11) im Glas (2) an den gegenüberliegenden Seitenflächen (4, 5) der Floatglasscheibe, weniger als 7 K, vorzugsweise weniger als 5 K beträgt, wobei die Ebenen jeweils entweder durch eine Seitenfläche (4, 5) der Floatglasscheibe (1) gebildet werden, oder innerhalb einer Tiefe bis 50 μm unterhalb der Oberfläche der Seitenfläche (4, 5) und parallel zur Seitenfläche (4, 5) verlaufen, dadurch gekennzeichnet, dass die fiktive Temperatur im Inneren des Glases zwischen den beiden Seitenflächen niedriger ist, als die fiktiven Temperaturen der beiden Ebenen an den Seitenflächen. Float glass pane (1) made of a chemically toughenable glass (2), wherein the glass pane (1) has a slice thickness of 0.25 mm to 1.5 mm, wherein the difference of the fictitious temperature of two levels (10, 11) in the glass (2 ) at the opposite side surfaces (4, 5) of the float glass pane, less than 7 K, preferably less than 5 K, the planes being formed either by a side face (4, 5) of the float glass pane (1), or within a depth extend to 50 microns below the surface of the side surface (4, 5) and parallel to the side surface (4, 5), characterized in that the fictitious temperature in the interior of the glass between the two side surfaces is lower than the fictitious temperatures of the two planes the side surfaces.

Disc-shaped, chemically toughened glass articles and process for their manufacture

Die Erfindung betrifft scheibenförmige, chemisch vorgespannte Glasartikel sowie ein Verfahren zur Herstellung solcher chemisch vorgespannten Glasartikel. The invention relates to disc-shaped, chemically toughened glass articles and a method for producing such chemically toughened glass articles.

Composite glass pane

The invention relates to a composite glass pane. Said pane comprises a first pane, a polymeric lamina having a thickness between at least 0.5 mm and at most 1.7 mm, and a second, inner pane having a thickness between at least 0.3 mm and at most 1.5 mm, and a lithium aluminium silicate glass. The polymeric lamina is arranged between the at least two glass panes. In addition, the glasses of the first and second panes are matched to one another such that the temperatures at which the two glasses of the first and second panes have the same viscosity within the viscosity range between 10 7 dPas and 10 10 dPas differ from one another only by a maximum of 50°C, preferably by a maximum of 30°C, more preferably by a maximum of 20°C and most preferably by a maximum of 10°C.

Process for the asymmetrization of the hydrogen content and for the production of a chemically highly pretensionable disc-shaped glass article and glass articles obtained according to the method

Die Erfindung betrifft ein Verfahren zur Asymmetrisierung des Wasserstoffgehalts eines scheibenförmigen, chemisch hoch vorspannbaren Glasartikels. Das Verfahren umfasst die folgenden Schritte: – Bereitstellen eines scheibenförmigen Ausgangsglases in Form eines Glasbandes oder einer Glasscheibe, aufweisend eine erste und eine zweite Oberfläche, und vorzugsweise Verbringen des Ausgangsglases in ein Auslagerungsaggregat, wobei die erste Oberfläche des scheibenförmigen Glases mit einem ersten Gas und die zweite Oberfläche des scheibenförmigen Glases mit einem zweiten Gas in Kontakt gebracht wird, – Temperieren mindestens eines Bereichs, vorzugsweise des Auslagerungsaggregates (BA), sodass mindestens ein Bereich des Glasbandes oder der Glasscheibe (BG), eine Temperatur von mindestens Tg – 50 K aufweist, sowie – Einstellen des Wassergehalts mindestens des ersten Gases in mindestens dem Bereich (BW), in welchem das Gas mit dem Bereich (BG) des scheibenförmigen Glases, welcher mindestens eine Temperatur von Tg – 50 K aufweist, in Kontakt ist, zur Einstellung einer Feuchteasymmetrie. Weiterhin betrifft die Erfindung ein Verfahren zur Herstellung eines chemisch hoch vorspannbaren Floatglases. Ein weiterer Aspekt der Erfindung betrifft verfahrensgemäß erhaltene Glasartikel. The invention relates to a method for asymmetrizing the hydrogen content of a disc-shaped, chemically highly prestressable glass article. The method comprises the following steps: providing a disk-shaped starting glass in the form of a glass band or a glass pane, having a first and a second surface, and preferably bringing the starting glass into a Auslagungsaggregat, wherein the first surface of the disc-shaped glass with a first gas and the second surface of the disc-shaped glass is brought into contact with a second gas, tempering at least one region, preferably of the aging aggregate (BA), so that at least one region of the glass ribbon or the glass sheet (BG) has a temperature of at least Tg-50 K, and ...

Glass with increased storage tensile stress, chemically prestressed glass article with increased storable tensile stress, method for the production of same and use thereof

Float method for producing a float glass pane and float glass pane

Die Erfindung betrifft eine Floatglasscheibe und Floatverfahren zur Herstellung einer Floatglasscheibe, wobei eine Glasschmelze kontinuierlich auf eine Metallschmelze (13) gegeben und in einer Ziehrichtung (8) zu einem Glasband (14) einer vorgegebenen Breite mit einer der Metallschmelze (13) zugewandten Zinnbadseite (15) und einer der Metallschmelze (13) abgewandten Oberseite (16) ausgezogen wird, wobei das Glasband (14) entlang der Ziehstrecke (9) abgekühlt wird, von der Metallschmelze (13) abgehoben und in einen Kühlofen (12) weitertransportiert wird, dadurch gekennzeichnet, dass in Ziehrichtung (8) gesehen in einem Abschnitt A der Ziehstrecke (9) hinter der Metallschmelze (13) eine O2-haltige Atmosphäre (30) bereitgestellt wird und durch Zuführung eines SO2-haltigen Gasstromes (35) an wenigstens einer ersten Stelle S1, sowie bevorzugt an weiteren Stellen Sn, die Atmosphäre im Abschnitt A eine höhere SO2-Konzentration an der Oberseite (16) als an der Zinnbadseite (15) des Glasbandes (14) aufweist. The invention relates to a float glass pane and float process for producing a float glass pane, wherein a molten glass is continuously applied to a molten metal (13) and in a drawing direction (8) to a glass ribbon (14) of a predetermined width with a Zinnbadseite (15) facing the molten metal (13) ) and one of the molten metal (13) facing away from the top (16), wherein the glass ribbon (14) along the drawing line (9) is cooled, lifted from the molten metal (13) and further transported in a cooling furnace (12), characterized in that, viewed in the drawing direction (8), an O 2 -containing atmosphere (30) is provided behind the molten metal (13) in a section A of the drawing section (9) and by supplying a SO 2 -containing gas stream (35) at at least a first location S 1 , and preferably at further points Sn, the atmosphere in section A has a higher SO2 concentration at the top (16) than at the tin bath side (15) of the glass sheet andes (14).

Dünnglassubstrat, insbesondere borosilicatglas-dünnglassubstrat verfahren und vorrichtung zu dessen herstellung

Thin glass substrate, method and apparatus for its production

A thin glass substrate, as well as a method and an apparatus are provided. The glass substrate has a glass having first and second main surfaces and elongated elevations on one of the main surfaces. The elevations rise in a normal direction, have a longitudinal extent that is greater than two times a transverse extent, and have a height, on average, that is less than 100 nm, and with a transverse extent of the elevation smaller than 40 mm. The method includes melting a glass, hot forming the glass, and adjusting a viscosity of the glass so that for the viscosity η1 for a first stretch over a first distance of up to 1.5 m downstream of a flow rate control component and y1 indicating a second distance to a location immediately downstream the flow rate control component the equation lg η1(y1)/dPa·s=(lg η01/dPa·s+a1(y1)) applies.

Plate-shaped glass articles and methods of producing and using

A plate-shaped or disc-shaped, chemically prestressed or chemically prestressable glass article is provided. The article includes a glass with a composition of SiO2, Al2O3, and Li2O; and a set-drop strength of at least 50 and up to 150, given as drop height in cm, wherein the drop height is given as the mean value of 15 samples, with the use of a sandpaper grit of 60. The glass has one or more features including: a CIL of greater than 1 N, 1.2 N, 2N, or 3 N, a DoL of at least 90 μm, 100 μm, 115 μm, or 130 μm, a content of network formers of at least 82 wt. %, and a content of alkali oxides of at most 14 wt. % or 12 wt. %.

Thin glass substrate, method and apparatus for its production

A thin glass substrate, as well as a method and an apparatus are provided. The glass substrate has a glass having first and second main surfaces and elongated elevations on one of the main surfaces. The elevations rise in a normal direction, have a longitudinal extent that is greater than two times a transverse extent, and have a height, on average, that is less than 100 nm, and with a transverse extent of the elevation smaller than 40 mm. The method includes melting a glass, hot forming the glass, and adjusting a viscosity of the glass so that for the viscosity η1 for a first stretch over a first distance of up to 1.5 m downstream of a flow rate control component and y1 indicating a second distance to a location immediately downstream the flow rate control component the equation lg η1(y1)/dPa·s=(lg η01/dPa·s+a1(y1)) applies.

Composite glass pane

A laminated glass pane is provided that includes a first glass sheet, a polymeric layer having a thickness between at least 0.5 mm and at most 1.7 mm, and a second inner glass sheet which has a thickness of at least 0.3 mm and at most 1.5 mm and is made of a lithium aluminum silicate glass. The polymeric layer is disposed between the at least two glass sheets. Furthermore, the glasses of the first and the second glass sheets are matched so that the temperatures at which the two glasses of the first and second glass sheets have the same viscosity in the viscosity range between 107 dPa·s and 1010 dPa·s differ from each other only by a maximum of 50° C.

Deckscheibe mit anomalem spannungsprofil, verfahren zu deren herstellung sowie deren verwendung

Chemically strengthened glass sheet and method for its production

The invention generally relates to glass sheets, in particular to chemically strengthened glass sheets, as well as to a method of production for these glass sheets. More particularly, the invention relates to glass sheets comprising a lithium containing aluminosilicate glass.

Chemically strengthened glass sheet and method for its production

A chemically strengthened glass sheet includes SiO 2 , Li 2 O and Al 2 O 3 as glass components, has a thickness between at least 0.3 mm and at most 3 mm, has a stress profile showing a local maximum of compressive stress at a depth within the glass article and, for a thickness of 0.7 mm, exhibits an integral of compressive stress of at least 3,500 MPa*μm and a DoCL of at least 160 μm. The local maximum is at a depth between at least 25 μm and at most 60 μm. A compressive stress of the local maximum is at least 60 MPa and at most 150 MPa. The glass sheet further includes at least 0.4 wt.-% B 2 O 3 and/or the glass sheet includes a) at least 40 wt.-% SiO 2 and b) at most 24 wt.-% Al 2 O 3 .

Plate-shaped, chemically prestressed glass articles and methods for producing

Plate-shaped, chemically prestressed glass articles as well as methods for producing such chemically prestressed glass articles are provided. The glass article has a glass with a composition comprising SiO2, Al2O3, and Li2O and a set-drop strength from 50 to 150. The glass has at least one feature selected from: a sodium exchange depth, a storable tensile stress, a network former content of at least 82 wt %, a content of alkali oxides of at most 12 wt %, a content of alkali oxides of at most 10 wt %, and any combinations thereof.