Abstract: In order to provide a mounting device for light guides which is pre-mountable on a heating element or on a cooking surface and which can be equipped with the light guides in a simple way, several receptacles (20) for the light guide ends are arranged beside each other on a common receptacle support (1). The receptacle support (1) can itself be formed as an attaching element or can be provided with at least one attaching element. The receptacles are sleeves (24) under tension or crimped sockets in which the light guide ends are inserted and gripped under tension.

Abstract: A process for CVD coating of a hollow body with a barrier layer, comprising measuring the temperature inside of the body by igniting plasma within said body with at least one ignition pulse and correlating the time between the ignition pulse and a pulse of light given off by plasma ignition, and a device for carrying out such a process.

Abstract: Cooktops with a glass or glass ceramic cooking surface include the usual multiple cooking zones and functional elements, like operating elements, display, etc. The cooking surface exhibits recesses, in which the operational zones, assigned to the elements, are mounted flush with the cooking surface. The operational zones are formed preferably by a glass or glass ceramic part, which is embedded in the cooking surface by means of a temperature stable, sealing connection. The cooking surface exhibits operational zones in the form of weighing, display and operating element zones.

Abstract: A process for coating an exterior of a lamp is disclosed, which comprises performing the coating in a microwave reactor by a microwave plasma CVD process and coupling microwave radiation into the microwave reactor with a microwave power greater than or equal to a power threshold value at which a plasma with reduced microwave permeability is ignited in the microwave reactor.

Abstract: A method for the manufacture of dense-sintered glass-ceramic shaped objects which have a coefficient of thermal expansion, .alpha., of -0.5.times.10.sup.-6 /K to 1.8.times.10.sup.-6 /K in the range between 20.degree. C. and 700.degree. C. whereby ceramizable glass powder and/or glass-ceramic powder from the system Li.sub.2 O-Al.sub.2 O.sub.3 -SiO.sub.2 is slip-cast by means of porous molds, dried, pretempered if necessary at temperatures up to 600.degree. C., vitrified and then sintered until the sintering temperature is reached up to relative densities of greater than 0.96 and ceramized, and whereby the glass powder and/or the glass ceramic-powder is prepared in a first grain size fraction of less than 63 .mu.m, in particular less than 45 .mu.m, and in a second grain size fraction of less than 7 .mu.m, in a ratio of the fractions to one another between 2:1 and 4:1, to form a stable, pourable slurry.

Abstract: Described is an alkali-free aluminoborosilicate glass with a viscosity of 10.sup.13 dPas at a temperature of above 700.degree.0 C., a processing temperature V.sub.A of less than 1220.degree.0 C., and very good chemical stability, which can be produced in a float unit and has the following composition, in % by weight based on oxide:______________________________________ SiO.sub.2 48 -- <55 B.sub.2 O.sub.3 7 -- 15 Al.sub.2 O.sub.3 >20 -- 26 MgO 0 -- 8 CaO 4 -- 12 BaO 0 -- 2 SrO 0 -- 2 ZnO 1 -- 8 ZrO.sub.2 0 -- 2 SnO.sub.2 0.5 -- 2 ______________________________________The glass is especially suitable for use in display technology.

Abstract: Disclosed is a method for the heat-softened severance of thin-walled glass tubes or plates with a wall thickness of no more than 0.2 mm, wherein the glass is softened on a width of no more than 0.4 mm, the softened area is reduced by drawing to a wall thickness of no more than 0.05 mm, and then is separated by additional heating in the drawn-out area.

Abstract: A plastic vessel has a barrier coating comprising sequentially arranged barrier layers of organic polymer and of inorganic oxides, nitrides or oxynitrides. The barrier coating preferably has at least two inorganic barrier layers. The thickness of the inorganic barrier layers lies between 2 and 300 nm and the thickness of the organic barrier layer lies between 2 and 1000 nm. The total thickness of the layer packet should not exceed 0.1 mm.

Abstract: The chemically prestressable glass having a low bubble count and bubble size has the following composition in mol %, based on a total amount of oxides present, SiO.sub.2 from 63.0 to 67.5 mol %, Al.sub.2 O.sub.3 from 9.5 to 12.0 mol %, Na.sub.2 O from 8.5 to 15.5 mol %, K.sub.2 O from 2.5 to 4.0 mol %, MgO from 3.0 to 9.0 mol %, sum of CaO+SrO+BaO+ZnO from 0 to 2.5 mol %, TiO.sub.2 from 0.5 to 1.5 mol %, CeO.sub.2 from 0.02 to 0.5 mol %, As.sub.2 O.sub.3 from 0.02 to 0.35 mol %, SnO.sub.2 from 0. to 1.0 mol %, and F.sub.2 from 0.05 to 2.6 mol %, wherein the molar ratio ?SiO.sub.2 !/?Al.sub.2 O.sub.3 ! is 5.3 to 6.85, the molar ratio ?Na.sub.2 O!/?K.sub.2 O! is 3.0 to 5.6, the molar ratio ?Al.sub.2 O.sub.3 !/?K.sub.2 O! is 2.8 to 3.6 and the molar ratio ?Al.sub.2 O.sub.3 !/?TiO.sub.2 +CeO.sub.2 ! is 7.6 to 18.5, but, when arsenic-free, SnO.sub.2 is from 0.02 to 1.0 mol % and F.sub.2 is from greater than 0.5 to 2.6 mol %.

Abstract: The present invention relates to an arrangement for assembling and mounting a built-in cooktop such as a glass-ceramic cooktop wherein the cooktop is seated latchably secured from above in a countertop cutout provided therefor. Tolerance problems between the built-in cooktop and the countertop cutout are avoided in that, in the assembly into the countertop cutout, an ancillary assembly frame is premounted with a precise fit to the built-in cooktop. The built-in cooktop is seated in the ancillary assembly frame and is secured via clamping connections or latch connections.

Abstract: Fire-resistant glass, produced by placing between two panes of glass a gel former containing a) an acid aluminum phosphate, b) a reaction product of boric acid with an alkanolamine and one or more alkali metal compounds, and heating the glass to convert the gel former to a gel.

Abstract: The invention is directed to a method of producing a chemically pretensioned glass body. In the method, a glass body is provided having a composition in percent by weight on oxide basis: SiO.sub.2 70-85; B.sub.2 O.sub.3 8-15; Na.sub.2 O 1-5; K.sub.2 O 1-<5; Al.sub.2 O.sub.3 1-5; MgO 0-3; SrO+BaO 0-2; CaO 0-3; ZnO 0-3; with CaO+ZnO 2-6; and, ZrO.sub.2 0-3.5. The glass body is placed in an ion exchange salt bath containing at least 90% by weight of potassium salts. The salt bath is maintained at a temperature below the transformation point Tg of the glass defined by the glass composition for a duration of at least 2.0 hr causing potassium ions from the salt bath to migrate into the surface region of the glass body to thereby produce the chemically pretensioned glass body.

Abstract: The process for producing a chemically prestressed glass of very high surface quality includes subjecting an Li.sub.2 O-free starting glass from the SiO.sub.2 -Al.sub.2 O.sub.3 -M.sub.2 O-MO system which also contains TiO.sub.2, CeO.sub.2 and F.sub.2 to chemical ion exchange by immersing it in a potassium salt bath at a temperature between 350.degree. C. and 550.degree. C. and at a residence time of between 0.5 and 20 hours to form the chemically prestressed glass. In a preferred embodiment of the process, the potassium salt bath contains a potassium nitrate melt and the glass is polished after prestressing. The chemically prestressed glass is particularly useful for making hard disks.

Abstract: The invention is directed to a method for producing low sintering fine-particle multicomponent glass powder having a particle size of the primary particle in the nanometer range. The method utilizes microemulsion techniques with subsequent separation of the particles out of the emulsion and calcination for utilization as glass flow having a sintering temperature <900.degree. C. or in a glass flow, for generating thin transparent layers or for generating color decorations on glass, glass ceramic or ceramic substrates after adding a coloring pigment to the glass flow. The microemulsion for producing the nanoscale glass powder particles is generated from a nonionic ambiphilic emulsifier with a component of 10 to 15 percent by weight on the emulsion, from an oil phase having a portion of 50 to 70 percent by weight and a glass precursor-containing aqueous salt solution having a portion of up to 31.3 percent by weight with salt contents of up to 45 percent by weight.

Abstract: The invention provides a device for clasp the rims of openings in shaped bodies made of glass ceramic, glass or ceramic, especially openings for the passage of atmospheric gas burners on cooking hobs or stovetops, from mechanical damage and for preventing soiling and damage to arrangements situated underneath the shaped body owing to the ingress of liquids through the openings in the shaped body. The clasp reaches over the rim of the respective opening and extends onto both the top and bottom sides of the shaped body. A sealing and/or heat-insulating material is advantageously inserted between the shaped body and the clasp.

Abstract: An arrangement displays information and operating states on an apparatus such as a cooking apparatus having a plate made of glass and/or glass ceramic and defining a lower surface and a transparent upper surface area where the information is viewed by an operator. The arrangement includes an attachment member; an adhesive for fixedly mounting the attachment member to the lower surface; a display device for generating a light display of the information and operating states below the plate to permit an operator to view the information and operating states through the plate by looking at the upper surface thereof; and, a connecting device for connecting the display device to the attachment member.

Abstract: Disclosed is a radiant burner with a burner chamber and a gas-permeable burner plate made of ceramic or metal, especially for cooking areas or individual cooking locations, the heating surface of which is composed of glass ceramic, the gas-permeable burner plate having regions of different gas permeability.

Abstract: The gas burner according to the invention has a burner chamber housing, a mixing pipe connected to the burner chamber housing for supplying a gas/air mixture, a burner plate made of fibrous material and attached to the burner chamber housing at edge regions of the burner plate, a blower for supplying air to make the gas/air mixture, and advantageously an ignition device, a safety device and a temperature monitoring device. A central region of the burner plate is advantageously directly or indirectly connected to a corresponding central region of the burner chamber housing to suppress burner plate vibration during start-up of burner operation to prevent sound generation during the start-up and minimize the pressure drop in the burner chamber.

Abstract: An alkali-free aluminoborosilicate glass preferably with a thermal expansion .alpha..sub.20/300 of about 3.7 .times.10.sup.-6 /K, an annealing temperature OKP of above 700.degree. C., a treatment temperature V.sub.A of less than 1220.degree. C., and very good chemical stability, which can be produced in a float unit and has the following composition (in % by weight based on oxide): SiO.sub.2 52-62; B.sub.2 O.sub.3 4-14; Al.sub.2 O.sub.3 12-20; MgO 0-8; CaO 4-11; BaO 0-2; ZnO 2-8; ZrO.sub.2 0-2; SnO.sub.2 0-2. The ratio of Al.sub.2 O.sub.3 /B.sub.2 O.sub.3 is preferably equal to or greater than 3. The glass is especially suitable for use in display technology.

Abstract: Hard glass fire retardant glasses can be tempered in a conventional air tempering plant having heat transmission values of approximately 200-500 W/(m.sup.2 .times.K) yielding in the tempered state a fire resistance period of at least 30 minutes according to DIN 4102 and the safety properties according to DIN 1249 (safe break). In order to achieve the combination of fire resistance period and safety properties, the glasses must have a coefficient of thermal expansion .alpha..sub.20/300 of between 3 and 6.times.10.sup.-6 K.sup.-1, a specific thermal stress .phi. of between 0.3 and 0.5 N/(mm.sup.2 .times.K), a glass transition temperature Tg of between 535.degree. and 850.degree. C., a product of specific thermal stress .phi. multiplied by (Tg -20.degree. C.) of between 180 and 360 N/mm.sup.2, an upper annealing temperature (temperature at a viscosity of 10.sup.13 dpas) of over 560.degree. C., a softening temperature (temperature at a viscosity of 107.sup.7.6 dpas) of over 830.degree. C.