Robert Boschgmbh

The Penn State Research Foundation

Alfons Kelnberger

Thomas R Shrout

Clive A Randall

Friederike Lindner

Stefan Henneck

Amanda Lou Baker

Huu Nguyen

Yi Fang

A method for preparing ceramic green compacts for ceramic assemblies, especially ceramic multilayer assemblies. First, a dispersing agent solution is prepared by homogenizing a dispersing agent in a solvent mixture. Then, a binder solution is prepared by homogenizing a solvent mixture, a binder made of acrylatemethacrylate polymer and a softener. After preparing a first dispersion by homogenizing a ceramic powder and the dispersing agent solution and subsequent deagglomerization, a second dispersion is prepared by homogenizing the first dispersion and the binder solution, and subsequently removing air and highly volatile solvent components from the second dispersion.

Method for producing ceramic green compacts for ceramic components

Co-fired multilayer piezoelectric ceramic materials with base metal electrodes based on copper, copper alloy, are found as an effective approach to manufacture low cost multilayer piezoelectrics. The method of the invention is performed at low firing temperature and without the oxidation of base metal or reduction of ceramic components. A variety of ceramic materials may be used and copper is the preferred base metal in the multi-layer piezoelectric devices of the invention. This copper has additional protection against oxidation with a small inorganic coating on the surface. With such protection, the binder and other organics can also be efficiently removed and produce superior performance in the piezoelectric structured devices.

Method of preparing multilayered piezoelectric ceramic material

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Stuttgart, Germany

Alfons Kelnberger