Robert Boschgmbh

Imke Koengeter

Ulrich Eisele

Gert Lindemann

Rudolf Pollner

Heinz Geier

Ingrid Wuehrl

Doris Peters

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 glass ceramic, for use as a resistor or a gas-tight glass ceramic solder for use in a spark plug, includes a fused seal of a starting glass fused from a starting mixture containing SiO , Al O , TiO and CaO, the fused seal including crystalline phases in at least some areas. A method for producing such a glass ceramic provides for the starting glass to be processed in a first method step to form a starting material, which is heated for a first period of time in a second method step from a starting temperature, which is below the softening temperature of the starting glass, to a fusion temperature, which is above the softening temperature of the starting glass, and is kept at that temperature for a second period of time and finally is cooled again. A spark plug may include a terminal stud and a center electrode, which are electrically connected across a resistor that is formed in at least some areas by the glass ceramic.

Glass ceramic material, method for producing the same and spark plug containing such a glass ceramic material

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Stuttgart, Germany

Imke Koengeter