Endress + Hauser Gmbh + Co. Kg

Endress + Hauser, Inc.

Detlef Schleiferböck

Elke Maria Schmidt

Andreas Rossberg

Ulfert Drewes

Andrea Berlinger

Andreas Roβberg

A ceramic product includes a first ceramic part and a second ceramic part, wherein the first ceramic part is connected with the second ceramic part via a joint, wherein the joint comprises an active hard solder, or braze, characterized in that the joint has an inhomogeneous distribution of the components of the active hard solder, or braze, wherein at least at an interface between the active hard solder, or braze, and the ceramic, the at least one active component of the active hard solder, or braze, is enriched. For manufacture of the product, the active hard solder, or braze, material is provided in such a manner, that at least one surface section of at least one of the ceramic parts is first coated with at least one active component of the active hard solder, or braze, and that on the coated section, an alloy is provided, which, by melting of the alloy during the heating, alloys with the coating and forms a metal joint between the two ceramic parts.

Ceramic product and method for its manufacture

The invention provides a pressure detector which has a small temperature-related measurement error, can be used in particular for small measurement ranges and has a sensor element (1), a sensor diaphragm (11) secured at its border, the non-secured parts of which sensor diaphragm can be deflected on account of the pressure which is to be measured, a housing (2), fastening means (3) for fixing the border of the sensor diaphragm (11) in the housing (2), a diaphragm (4) which closes off the housing (2) and is to be supplied with a pressure which is to be measured, and a solid body (5) with a modulus of elasticity which is suitable for minimizing the temperature-related measurement error, which solid body is arranged between the diaphragm (4) and the deflectable part of the sensor diaphragm (11) and which solid body transmits the pressure from the diaphragm (4) to the sensor diaphragm (11).

Pressure sensor with a solid to minimize temperature-related measurement

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Hausen, Germany

Detlef Schleiferböck