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Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Norbert Greulich-Hickmann

Frank-Thomas Lentes

Andreas Langsdorf

Ulrich Peuchert

Uwe Kolberg

Bernd Hoppe

Werner Kiefer

Hauke Esemann

Christian Kunert

Michael Kluge

Karin Naumann

Ulrich Fotheringham

Yvonne Menke

Matthias Brinkmann

Philipp Treis

Markus Garsche-Andres

Simone Monika Ritter

Ulrich Lange

Volker Ohmstede

Günter Weidmann

Hildegard Römer

Gerhard Hahn

Guenter Weidmann

Guido Räke

Jörg Adler

Jan Philipp Steigleder

Andreas Gross

Hildegard Roemer

Guido Raeke

Thomas Stelle

Michael Piwonski

Fritz Schroeder

Hubertus Bader

Carsten Weinhold

Wolfgang Jost

Monika Bürkner-Brigaldino

A sintered body for use as a liquid reservoir in an electronic cigarette, medication administering devices, in thermally heated evaporators for fragrant substances is provided. The sintered body is made of open-pore sintered glass and has a porosity of greater than 50 vol %. The average pore size is in a range from 1 to 450 &#x3bc;m. The glass of the sintered body has a transition temperature Tof at least 450&#xb0; C.

Open-pore sintered glasses for use in electronic cigarettes

For permitting temperature manipulation of a melt even at a conductivity below 10&#x3a9;cmand thus permitting refining of the melt at temperatures about 1700&#xb0; C., the invention provides a method and a device for temperature manipulation of a melt (), in particular in a refiner unit. The melt () is heated at least by ohmic resistance heating with at least two electrodes () that are arranged in the melt (). At least a part of the melt () is cooled. The device () for temperature manipulation, refining, purification and homogenisation of a melt () comprises at least one arrangement for accommodating melt material (), defining an inner chamber, and at least two electrodes () for ohmic resistance heating of the melt (). The electrodes () project into the inner chamber of the arrangement, in particular of a vessel ().

Method for temperature manipulation of a melt

The method of continuously producing flat glass includes rolling a fluid glass sheet between upper and lower shaping rollers to shape and calibrate the glass sheet, generating a respective gas cushion between the fluid glass sheet and each shaping roller from a liquid, controlling the pressure of the gas cushion between the fluid glass sheet and the upper shaping roller to completely prevent contact of the glass sheet with the upper shaping roller, controlling the pressure of the gas cushion between the fluid glass sheet and the lower shaping roller to form a linear contact area between the fluid glass sheet and the lower shaping roller and controlling the contact area width according to speed and viscosity of the glass sheet in order to transport it without slipping and reduce cooling path length.

Method of continuously producing flat glass by rolling

The invention relates to a method and device for non-contact molding of fused glass or glass ceramic gobs by means of gas levitation, comprising the following method steps: a pre-form is generated, the pre-form is brought close to a molding tool, which may be connected to a compressed gas source on the open-pored region thereof facing the pre-form in order to generate a gas cushion between the molding tool and the pre-form and the molding tool is directly heated at least during a part of the molding phase.

Method and device for non-contact moulding of fused glass gobs

An apparatus for press-forming a molten gob made of meltable material, especially of glass or glass ceramics, into a body of specific shape with compression moulds which form with each other a form cavity for receiving the gob. The compression moulds consist at least in the zone of the forming surfaces of an open-pore material and the compression moulds are connected to a pressure gas source in order to produce a gas stream which emerges from the forming surfaces. The open-pore material of the forming surfaces the pores close to the forming surfaces are smaller than the pores remote from the forming surfaces.

Apparatus for press-forming molten bodies

A method for the homogeneous heating of semitransparent and/or transparent glass and/or glass-ceramic articles using infrared radiation so that the glass and/or glass-ceramic articles undergo heat treatment at between 20 and 3000&#xb0; C., notably at between 20 and 1705&#xb0; C. Heating is achieved by a component of infrared radiation which acts directly on the glass and/or glass-ceramic articles and by a component of infrared radiation which acts indirectly on said glass and/or glass-ceramic articles. The radiation component indirectly acting on the glass and/or glass-ceramic articles accounts for more than 50% of total radiation output.

Method and device for the homogenous heating of glass and/or glass-ceramic articles using infrared radiation

The invention relates to a method of producing glass-ceramic parts and/or glass parts by deformation of a glass-ceramic blank and/or glass blank. The invention is characterized in that forming is carried out using infrared radiation.

Method of forming glass-ceramic parts and/or glass parts

Method for the hot shaping of molten gobs

The silicate glass has a composition (in % by weight, based on oxide) of SiO , 54-72; Al O , 0.5-7; ZrO , 10-20; B O , 0-<5; Na O, 3-<8; K O, 0-5; with Na O&plus;K O, 2-<8; CaO, 3-11; MgO, 0-10; SrO, 0-8; BaO, 0&prop;10; with CaO&plus;MgO&plus;SrO&plus;BaO, >5-24; La O , 0-5; and TiO , 0-4. The glass also contains at least 0.6 percent by weight of La O or at least 0.1 percent by weight TiO . The glass has a hydrolytic resistance in hydrolytic glass 1, an acid resistance in acid class 3 or better, preferably acid class 1, a caustic lye resistance in lye class 1, a glass transition temperature (T ) of at least 650&deg; C., a thermal expansion coefficient (&agr; ) of 4.1&times;10 to 7.4&times;10 /K, a refractive index (n ) of 1.53 to 1.63, an Abb&eacute; number (&ngr; ) of 48 to 58 and a negative anomalous partial dispersion in a blue spectral region (&Dgr;P ) of up to &minus;0.0130.

Glass with high proportion of zirconium-oxide and its uses

The silicate glass has a composition (in % by weight, based on oxide) of SiO , 54-72; Al O , 0.5-7; ZrO , >10-<18; B O , 0-<5; Na O, 2-<10; K O 0-5; with Na O&plus;K O, 2-<10; caO, 3-11; MgO, 0-10; SrO, 0-8; BaO, 0-12; with CaO&plus;MgO&plus;SrO&plus;BaO, >5-24; La O , 0-6; and TiO , 0-4. The glass has at least 0.6% by weight of La O or at least 0.1% by weight TiO . The glass is in hydrolytic glass 1, acid class 3 or better, preferably acid class 1, and lye class 1. It has a glass transition temperature (T ) of at least 640&deg; C., a thermal expansion coefficient (&agr; ) of 4.1&times;10 to 8.0&times;10 /K, a refractive index (n ) of 1.53 to 1.63, an Abb&eacute; number (&ngr; ) of 47 to 66 and a negative anomalous partial dispersion in a blue spectral region (&Dgr;P ) of up to &minus;0.0130.

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Mainz, Germany

Norbert Greulich-Hickmann