Abstract: The invention relates to glass articles, such as for example glass tubes or flat glasses, where the material at the surface by a targeted process control has gradient material properties which in turn result in a compressive prestress of the surface. The invention also relates to a method for the production of the glass articles as well as their use.

Abstract: The invention relates to glass articles, in particular flat glasses, in the case of which the surface material has gradient material properties as a result of targeted process control which in turn lead to compressive prestressing of the surface. The invention also relates to a method for producing the glass articles and the use thereof.

Abstract: A glass includes a composition characterized by the following constituent phases (in mol-%): 20-80 lanthanum titanate; 10-50 lanthanum niobate; 0-60 lanthanum molybdenum borate; 2-40 lanthanum borate; 2-40 yttrium borate; 0-40 gadolinium borate; 2-40 zirconium silicate; 2-40 diboron trioxide; and 0-20 silicon dioxide. A refractive index is at least 2.00.

Abstract: The invention relates to glass articles, such as for example glass tubes or flat glasses, where the material at the surface by a targeted process control has gradient material properties which in turn result in a compressive prestress of the surface. The invention also relates to a method for the production of the glass articles as well as their use.

Abstract: A glass having a good hydrolytic resistance and alkali resistance is defined by a targeted combination of stoichiometric glasses, including glasses also existing as crystals in the same stoichiometry and whose properties can be assumed as being very similar due to the identical topology of the structural units for glass and crystal, respectively. A process of producing the glasses is also provided.

Abstract: A glass includes a composition which is characterized by the following constituent phases of the glass: 20-80 mol % silicon dioxide; 0-40 mol % wollastonite; 0-30 mol % cordierite; 0-40 mol % anorthite; 0-40 mol % strontium-feldspar; 0-20 mol % celsian; 0-40 mol % hardystonite; 0-10 mol % titanite; and 0-15 mol % gittinsite. Where the composition is specified in mol % relative to oxides, the glass contains less than 11.5 mol % Al2O3 and less than 5000 ppm (molar, relative to the oxides) of each of B2O3, Li2O, Na2O, K2O, Rb2O and Cs2O. A calculated value for the removal rate according to ISO 695 is not more than 81.9 mg/(dm2 3 h) and a calculated value for the removal rate in acid according to DIN12116 is less than 3.5 mg(dm2 6 h).

Abstract: A glass, a glass article made of the glass as well as uses and production methods are disclosed. The glass constituents are selected such that excellent scratch resistance and impact strength are provided. The glass has a composition characterized by the following constituent phases: 15-60 mol % reedmergnerite; 20-60 mol % albite; 0-20 mol % nepheline; 0-20 mol % orthoclase; 0-20 mol % parakeldyshite; 0-20 mol % narsarsukite; 0.1-30 mol % disodium zinc silicate; 0-4 mol % diboron trioxide; 0-20 mol % cordierite; and 0-20 mol % danburite. A quotient of a coefficient of thermal expansion of the glass multiplied by 1000 (in ppm/K) and the product of a pH value and a removal rate in alkaline environment (in mg/(dm23h)) according to ISO 695 is at least 8 and the removal rate in alkaline environment according to ISO 695 is at most 115 mg/(dm23h).

Abstract: A glass is described, a glass article made of the glass as well as uses and production methods. The glass constituents are selected such that it results in excellent chemical stability and ion ex-changeability. The glass has a composition characterized by the following glass constituent phases: 0-35 mol % reedmergnerite; 10-60 mol % albite; 3.5-25 mol % orthoclase; 0-40 mol % natrosilite; 0-20 mol % parakeldyshite; 0-20 mol % narsarsukite; 0-35 mol % disodium zinc silicate; 0-35 mol % silicon dioxide; 0-30 mol % cordierite; and 0-20 mol % danburite. A quotient of a coefficient of thermal expansion of the glass multiplied by 1000 (in ppm/K) and the product of a pH value and a removal rate in alkaline environment (in mg/(dm23h)) according to ISO 695 is at least 9.25.

Abstract: Glasses and glass products which combine the chemical temperability with very good alkali and acid resistance, hydrolytic resistance, as well as a desired coefficient of thermal expansion are provided. The glass has a composition characterized by the following constituent phases: a composition characterized by the following constituent phases: 20-60 mol % albite; 0-40 mol % silicon dioxide; 0-20 mol % orthoclase; 0-10 mol % wollastonite; 0-20 mol % enstatite; 0-20 mol % parakeldyshite; 0-20 mol % narsarsukite; 0-40 mol % disodium zinc silicate; 0-20 mol % cordierite; 0-10 mol % strontium silicate; and 0-10 mol % barium silicate.

Abstract: The present invention relates to glasses, such as e.g. thin or thinnest glasses, but also to glasses for the production of tubular glass, carpules and syringes as well as other pharmaceutical vessels. The glasses are characterized by a high chemical prestressability (tem-perability) with very well alkali, hydrolytic and/or acid resistance as well as an advantageous coefficient of thermal expansion. The glass has a composition characterized by the following constituent phases: 0-60 mol % reedmergnerite; 20-60 mol % albite; 0-30 mol % orthoclase; 0-20 mol % natrosilite; 0-20 mol % sodium metasilicate; 0-20 mol % parakeldyshite; 0-20 mol % narsarsukite; 0-20 mol % disodium zinc silicate; 0-21 mol % cordierite; and 0-20 mol % danburite. A quotient of a coefficient of thermal expansion of the glass multiplied by 1000 (in ppm/K) and the product of a pH value and a removal rate in alkaline environment (in mg/(dm23h)) according to ISO 695 is at least 9.0.

Abstract: The present invention relates to glasses having a composition made up of base glasses. The glasses have a good chemical toughenability in combination with an advantageous coefficient of thermal expansion. Owing to their composition and the production process, the homogeneity of the properties of the glasses at their surface is high compared to the bulk glass. Furthermore, the fragility of the glasses is low, so that they can be processed to produce very thin glass articles.

Abstract: The present invention relates to glasses having a composition made up of base glasses. The glasses have a good chemical toughenability in combination with an advantageous coefficient of thermal expansion. Owing to their composition and the production process, the homogeneity of the properties of the glasses at their surface is high compared to the bulk glass. Furthermore, the fragility of the glasses is low, so that they can be processed to produce very thin glass articles.

Abstract: An alkali borosilicate glass is provided that includes: SiO2 70-86 wt % Al2O3 0-5 wt % B2O3 9.0-25 wt % Na2O 0.5-5.0 wt % K2O 0-1.0 wt %, and Li2O 0-1.0 wt %. 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.

Abstract: The present invention relates to glasses having a composition made up of base glasses. The glasses have a good chemical toughenability in combination with an advantageous coefficient of thermal expansion. Owing to their composition and the production process, the homogeneity of the properties of the glasses at their surface is high compared to the bulk glass. Furthermore, the fragility of the glasses is low, so that they can be processed to produce very thin glass articles.

Abstract: A glass having a good hydrolytic resistance and alkali resistance is defined by a targeted combination of stoichiometric glasses, including glasses also existing as crystals in the same stoichiometry and whose properties can be assumed as being very similar due to the identical topology of the structural units for glass and crystal, respectively. A process of producing the glasses is also provided.

Abstract: An alkali borosilicate glass is provided that includes: SiO2 70-86 wt % Al2O3 0-5 wt % B2O3 9.0-25 wt % Na2O 0.5-5.0 wt % K2O 0-1.0 wt %, and Li2O 0-1.0 wt %. 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.

Abstract: The production of optoelectronic components, optical components being mounted in the composite wafer. Provided to this end is a method for producing optoelectronic components, in particular image signal acquiring or image signal outputting components, in the case of which optical components are respectively provided, picked up and mounted on a wafer, the optical components preferably respectively being positioned individually or in groups relative to the position of assigned optoelectronic or optical components of the wafer or of a wafer to be connected thereto.

Abstract: A method for producing optoelectronic components, the method comprising the steps of: providing optical components; picking up, by means of a robot arm, the optical components provided; subsequent to picking up the optical components, mounting the optical components directly on a first wafer by means of the robot arm; wherein the first wafer has optoelectronic components attached, and the optical components being positioned individually or in groups relative to the position of the optoelectronic components of the first wafer using the robot arm; and utilizing, as the first wafer, a glass wafer having i) spectrally filtering glass being an infrared filter glass and ii) an infrared filter coating, the glass wafer having a thickness in the range of 50 to 500 micrometers.

Abstract: a method and to an apparatus for producing optical glass elements, in particular for producing what is referred to as low-cost optics for focusing light onto small areas, for example, for photovoltaic applications or optical couplers. The method for producing the optical glass elements includes: providing a glass rod having a selected cross-section, heating the glass rod such that it can be deformed in at least some sections, molding at least one optical glass element from the deformable section using a molding tool, separating the optical glass element from the glass rod at the connection, arranging a plurality of separated optical glass elements to form a group, and grinding and/or polishing at least one section of the separating surfaces of the grouped optical glass elements. The invention makes it possible to produce optical glass elements that meet low quality requirements in high quantities and with high output at low cost.

Abstract: The invention relates to a method for the manufacture of packaged components. The invention is based here on the problem of facilitating the application of covers with lateral dimensions that are smaller than the lateral dimensions of the functional substrate. For this purpose, a plate-like cover substrate is mounted on a carrier substrate. Then, on the uncovered side of the plate-like cover substrate, trenches are inserted, so that a composite part is obtained with the carrier substrate and individual covering parts that are separated from each other by the trenches, but interconnected by the carrier substrate. The covering parts of the composite part are connected with a functional substrate with a plurality of components. Then, the connection of the covering parts is dissolved with the carrier substrate, and the carrier substrate is removed, so that a composite is obtained with the functional substrate and a plurality of covering parts that cover functional areas.