Schott Ag

Hellma Materials Gmbh

Schott Technical Glass Solutions Gmbh

Hellma Materials Gmbh & Co. Kg

Jochen Alkemper

Thilo Zachau

Lutz Klippe

Thomas Schmiady

Ulrich Peuchert

Martin Letz

Christian Kunert

Wolfram Beier

Michael Schwall

Steffen Reichel

Peter Thomas

Armin Vogl

Frank-Thomas Lentes

Lutz Parthier

Meike Schneider

Oliver Hochrein

Jose Zimmer

Dirk Sprenger

Christian Mix

Yoshio Okano

Hrabanus Hack

Bernd Schultheis

Peter Brix

Simone Monika Ritter

Joseph S Hayden

Bernd Hoppe

Thomas Pfeiffer

Ina Mitra

Rainer Liebald

Inka Henze

Ulf Dahlmann

Thomas Kloss

Ulrich Fotheringham

Yvonne Menke

Bernd Ruedinger

Carsten Weinhold

Joerg Schuhmacher

Andreas Menzel

Gerhard Lautenschläger

Gunther Wehrhan

Ute Natura

José Zimmer

Gerhard Lautenschlaeger

Frank Coriand

Rüdiger Dietrich

Michael Meister

Regina Martin

Lutz Aschke

Andreas Voitsch

Axel Curdt

Joerg Staeblein

Wolfgang Triebel

Klaus Petermann

Matthias Schmidt

Oliver Sohr

Christian Muehlig

Rolf Martin

Konrad Knapp

Thomas Seuthe

Gordon Kissl

Susanne Krüger

Gunther Paulus

Detlef Wolff

Marta Krzyzak

Markus Schweizer

Gerrit Panzner

Sandra Von Fintel

Johann-Christoph Von Saldern

Christoph Seitz

Joe Hayden

Julia Weißhuhn

Axel Schindler

Frank Frost

Thomas Haensel

Renate Fechner

Lars Mueller

Julian Koch

Ruediger Dietrich

Inge Burger

Irmgard Westenberger

Gerd Rudas

Katharina Alt

Christian Mlx

Arne Lange

Thomas Jördens

Christian MÜHLIG

Dirk Springer

Gordon Von Der Gönna

A cover glass is provided that includes a silica based glass ceramic with a thickness between 0.4 mm and 0.85 mm. The glass ceramic has a transmittance of more than 80% from 380 nm to 780 nm and a stress attribute selected from: an overall compressive stress (CS) of at least 250 MPa and at most 1500 MPa, a compressive stress at a depth of 30 μm (CS30) from one of the two faces of at least 160 MPa and at most 525 MPa, a depth of the compression layer (DoCL) of at least 0.2 times the thickness and less than 0.5 times the thickness, and any combinations thereof. The glass ceramic has at least one silica based crystal phase having in a near-surface layer a unit cell volume of at least 1% by volume larger than that of a core where the crystal phase has minimum stresses.

Glass-ceramic cover glass, process for production thereof and use thereof, and digital display device comprising such a cover glass

The invention relates to a method for producing a glass substrate for vehicle glazing, in particular for a windscreen of a vehicle, which comprises hot forming of a borosilicate glass, wherein in a hot forming section, at least during stretching of the glass () in the flow direction or longitudinal direction of movement of the glass (), an aging velocity Av of the glass () to be hot formed does not exceed 10 mm/s and an aging velocity Av of the glass preferably does not undershoot 3 mm/s, and also relates to glass substrates for vehicle glazing produced by such method as well as to windscreen projection devices and driver assistance systems comprising such glass substrates.

Glass substrate for vehicle glazing, in particular for the windscreen of a vehicle

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.

Thin glass substrate, method and apparatus for its production

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.

Composite glass pane

A thermally tempered glass element is provided made of glass with two opposite faces that are under compressive stress of at least 40 MPa. The glass has a working point at which the glass has a viscosity of 10dPa·s of at most 1350° C. The glass has a viscosity versus temperature profile and a coefficient of thermal expansion versus temperature profile of the glass are such that a variable (750° C.-T)/(CTE-CTEs) has a value of at most 5*10K. The CTEis a coefficient of linear thermal expansion of the glass above a glass transition temperature T, the CTEis a coefficient of linear thermal expansion of the glass in a temperature range from 20° C. to 300° C., and the Tis a temperature at which the glass has a viscosity of 10dPa·s.

Thermally tempered glass element and use thereof

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.

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

Chemically toughened glass is provided that has a depth of compressive stress for potassium of at least 4 &#x3bc;m and at most 8 &#x3bc;m; a compressive stress at a depth of 30 &#x3bc;m 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 &#x3bc;m, 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.

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

A thermally tempered glass element is provided made of glass with two opposite faces that are under compressive stress of at least 40 MPa. The glass has a working point at which the glass has a viscosity of 10dPa&#xb7;s of at most 1350&#xb0; C. The glass has a viscosity versus temperature profile and a coefficient of thermal expansion versus temperature profile of the glass are such that a variable (750&#xb0; C.&#x2212;T)/(CTE&#x2212;CTE) has a value of at most 5*10K. The CTEis a coefficient of linear thermal expansion of the glass above a glass transition temperature T, the CTEis a coefficient of linear thermal expansion of the glass in a temperature range from 20&#xb0; C. to 300&#xb0; C., and the Tis a temperature at which the glass has a viscosity of 10dPa&#xb7;s.

An alkali borosilicate glass is provided that includes:  The proportions of the components are chosen in such a way that the weighted crosslinking index, that is, the mean number n of constraints per atom has a value greater than 2.9.

Borosilicate glass with low brittleness and high intrinsic strength, the production thereof, and the use thereof

A light guide plate for guiding of visible light for the backlighting of a liquid crystal display is provided. The light guide plate has two parallel lateral faces and at least one edge face, which serves preferably as a light input face. The light guide plate is a glass that contains BOand SiOas components, wherein the total content of BOand SiOis at least 70 weight percent and the BOcontent is greater than 10%. The total content of metal oxide of divalent metals in the composition of the glass is less than 3 weight percent. AlOis contained between 1 weight percent and 5 weight percent in the composition.

Light guide plate and optical display with backlighting

A glass element is provided that is made of a glass having SiO, AlO, BO, and NaO. The glass has a scratch tolerance that when scratches of 1 mm length are introduced using a Knoop diamond indenter which presses upon a surface of the glass with a force of 4 Newton and is displaced along the surface with a traverse speed of 0.4 mm/s, not more than 20% of the scratches have a noticeable width including visible chipping of more than 25 &#x3bc;m. In some embodiments, the glass, after chemical tempering, has sodium ions that are at least partially exchanged for potassium ions so that a compressive stress zone is provided at the surface of the glass. The compressive stress is at least 700 MPa and an exchange depth of alkali ions is at least 25 &#x3bc;m.

Glass element with high scratch tolerance

A lithium aluminosilicate glass and a method for producing such lithium aluminosilicate glass are provided. The glass has a composition, in mol %, of: SiO60-70; AlO10-13; BO0.0-0.9; LiO 9.6-11.6; NaO 8.2-less than 10; KO 0.0-0.7; MgO 0.0-0.2; CaO 0.2-2.3; ZnO 0.0-0.4; ZrO1.3-2.6; PO0.0-0.5; FeO0.003-0.100; SnO0.0-0.3; and CeO0.004-0.200. Further, the composition complies with the following relations and conditions: (LiO+AlO)/(NaO+KO) greater than 2; LiO/(LiO+NaO+KO) greater than 0.47 and less than 0.70; CaO+FeO+ZnO+PO+BO+CeOgreater that 0.8 and less than 3, where at least four out of the six oxides are included. The glass exhibits a modulus of elasticity of at least 82 GPa and has a glass transition point below 540&#xb0; C. and/or a working point below 1150&#xb0; C.

Lithium aluminosilicate glass with high modulus of elasticity, and method for producing same

The scintillation material has a maximum oxygen content of 2,500 ppm and is a compound of formula LnXor LnX:D, wherein Ln is at least one rare earth element, X is F, Cl, Br, or I; and D is at least one cationic dopant of one or more of the elements Y, Zr, Pd, Hf and Bi and, if present, is present in an amount of 10 ppm to 10,000 ppm. The process of making the scintillation material includes optionally mixing the compound of the formula LnXwith the at least one cationic dopant, heating the compound or the mixture so obtained to a melting temperature to form a melt, adding one or more carbon halides and then cooling the melt to form a crystal or crystalline structure. The maximum oxygen content of the scintillation material is preferably 1000 ppm.

Scintillation materials of low oxygen content and process for producing same

Growing community of inventors

Klein-Winternheim, Germany

Jochen Alkemper