Robert Boschgmbh

Hoechst Ceramtec Aktiengesellschaft

Gert Lindemann

Friederike Lindner

Ulrich Eisele

Christoph Kern

Wolfgang Dressler

Albrecht Geissinger

Wilfried Aichele

Georg Hejtmann

Petra Stedile

Stefan Fuenfschilling

Moritz Oldenkotte

Guenter Knoll

Tony Pleschinger

Adrian Jenni

Wolfgang Otterbach

Christoph Haluschka

Werner Gruenwald

Horst Boeder

Andreas Reissner

Andreas Harzer

Thomas Rohner

Donat Frei

Volker Rothacker

Matthias Rowek

Thomas Nething

Karl-Hermann Friese

Thomas Brinz

Johannes Locher

Harald Neumann

Claudio De La Prieta

Frank Stanglmeier

Hermann Dietz

Heinz Geier

Klaus-Peter Schmoll

Gerhard Keuper

Jens Stefan Schneider

Thomas Moser

Lothar Weber

Jurgen Heinrich

Carmen Schmiedel

Werner Benker

Ingrid Wuehrl

Christof Rau

Imke Koengeter

Matthias Wiedmaier

Harry Schlachta

Eckart Kuglin

Friedericke Lindner

Doris Peters

An abrasive particle includes at most three surfaces and at least one edge which has a corner at at least one end. The abrasive particle may contain a ceramic material, particularly polycrystalline &#x3b1;-AlO. Abrasive particles as a whole, methods for producing abrasive particles, moulds, abrasive articles, methods for producing abrasive articles, and methods for abrading a surface are also disclosed.

Abrasive particle with at most three surfaces and one corner

An abrasive grain includes a surface having at least a first face with a first outline, and at least one second face with a second outline. The first outline does not contain any vertices, but the second outline contains at least one vertex. The abrasive grain may include a ceramic material, especially polycrystalline &#x3b1;-AlO.

Abrasive grain with main surfaces and subsidiary surfaces

An abrasive particle includes at most three surfaces and at least one edge which has a corner at least one end. The abrasive particle may contain a ceramic material, particularly polycrystalline &#x3b1;-AlO. Abrasive particles as a whole, methods for producing abrasive particles, moulds, abrasive articles, methods for producing abrasive articles, and methods for abrading a surface are also disclosed.

Abrasive grain containing a first face without vertices and a second face with vertices

A passive, high-temperature-resistant resistor element for measuring temperature is provided, the resistor element having an essentially interior insulating layer and two exterior conducting layers of a ceramic composite structure; the conducting layers being connected to one another at the tip of the resistor element; and the ceramic composite structure including trisilicon tetranitride, a metal silicide, and yttrium oxide or trisilicon tetranitride, a metal silicide, and a matrix phase of SiOCN, where x signifies 1&#x2013;2, y signifies 0&#x2013;2, and w signifies 0&#x2013;2. A combination element of this resistor element and a sheathed type glow plug, for example, is also provided.

Passive, high-temperature-resistant resistor element for measuring temperature in passenger and commercial vehicles

A method of producing ceramic greenware, in particular a ceramic green film, having a ceramic powder component as the main ingredient and at least one organic solvent-free component as a secondary ingredient. To do so, the ceramic powder component is processed with the organic components initially to yield a highly viscous, solvent-free starting material which is then shaped by an extruder to form the greenware or green film.

Method for producing ceramic green bodies

A method for manufacturing composite materials from a parent substance containing silicon nitride and metal silicide, having fixed electrical properties. The molded articles are made, virtually with their final contours, prior to a sintering operation. The parent substance containing Si N and a metal silicide is subjected to a gas pressure sintering in a nitrogenous atmosphere. The metal silicide is of the form Me Si , where Me is a metal. As a function of a sintering temperature, a lower limit of partial nitrogen pressures is selected so that Si N is stable at the lower limit and an upper limit of the partial nitrogen pressures is selected so that Me Si is stable at the upper limit. The resulting composite material is a silicon-containing composite material made of Si N and the metal silicide. The metal silicide is selected from the group of Nb Si , V Si , Ta Si and W Si .

Method for producing composite materials and examples of such composite materials

A sheath heater in a sheathed-type glow plug for diesel engines is described, having at least one generally internal insulation layer and at least one generally external conductive layer, both layers making up a ceramic composite structure. The sheath heater has a generally uniform overall cross-section, generally over its entire length, and, in the area of a tip of the sheath heater, the proportion of the insulation layer in the overall cross-section increases, whereas the proportion of the conductive layer in the overall cross-section decreases.

Sheath heater

A device is proposed for monitoring the combustion process in internal combustion engines, a direct monitoring and a monitoring of individual combustion processes, in particular individual combustion chambers, being possible. This is achieved using a waveguide, which is integrated in a component, which protrudes into the combustion chamber.

Device for monitoring the combustion process in internal combustion engines

A ceramic sheathed-type glow plug, whose ceramic heating element is made of an electrically conductive conducting layer and an electrically insulating layer, is described. The conducting layer is made of lead layers and a heating layer. The higher specific electrical resistance of the heating layer allows the temperature of the heating layer and the combustion chamber to be determined. The electrical contact between a connector element and the heating element is established by a contacting element, which is in the form of a pellet made of an electrically conductive powder.

Ceramic sheathed element glow plug

A sensor element, especially a temperature sensor ( ) is proposed, having a sensitive area ( ), whose electrical resistance changes under the influence of a temperature to which the sensitive area ( ) is exposed. In this case, sensitive area ( ) has a glass ceramic fusion ( ) of a starting material containing at least one component which is furnished at least substantially with a surface metallization. The proposed temperature sensor ( ) is especially suitable for use at temperatures in excess of 1000&deg; C., at which it shows resistance characteristics like that of a platinum resistor.

Sensor element, in particular a temperature sensor

A ceramic sheathed-element glow plug is proposed in which a metallic tubular holder holds a ceramic U-shaped heating device in a cantilevered fashion at its combustion chamber side end and has a terminal stud for applying a voltage to the ceramic heating device on the end remote from the combustion chamber. At its end enclosed by the holder, the ceramic heating device has a segment of greatest diameter and is coated with an insulating layer which has recesses for an electrical contacting. One recess is provided at the end of the ceramic heating device remote from the combustion chamber and a second recess is provided on the external wall of the ceramic heating device. A for an electrically conductive sealing compound is provided between the external wall of the ceramic heating device and the internal wall of the holder.

A ceramic pin heating element having exterior heating conductors and integrated electrical connection surfaces, and method for making same. A first body is injection molded from a first injection-moldable ceramic composite compound having a first electrical resistance, and a second body is injection-molded from a second injection-moldable ceramic composite compound having a second electrical resistance about the first body so as to form a compound body. The compound body is then sintered. The resulting ceramic pin heating element is directly formed without additional steps for protecting (insulating) the element so as to prevent the exterior, complementary heating conductors from contacting the housing and/or terminal bolts. The danger of breakage of the pins at the mounting location and/or at the seal seat through variations in the thickness of contact and/or insulation coatings is minimized.

Ceramic pin heating element with integrated connector contacts and method for making same

A ceramic sheathed element glow plug has a tubular metal casing holding a ceramic U-shaped heating device cantilevered at its end facing the combustion chamber, and on the end remote from the combustion chamber, it has a terminal pin for applying a voltage to the ceramic heating device. In the metal casing, a ceramic bushing and a ring follow the ceramic heating device at the end remote from the combustion chamber.

Ceramic sheathed-type glow plug

A method for manufacturing molded articles from a ceramic composite structure, in particular from a combination of tri-silicon tetranitride and a metal silicide, in which gas pressures up to 100 bar are used and the sintering additive content can be reduced to under 10 mass percent. This inert gas sintering pressure method makes possible larger molding free spaces in complicated geometrical structures of the molded articles, in contrast to the known methods. In addition, the electrical properties of this composite structure can be regulated by adjusting a defined nitrogen partial pressure.

Method for manufacturing molded articles from a ceramic composite structure

Growing community of inventors

Lichtenstein, Germany

Gert Lindemann