A PROCESS FOR PRODUCING AN ASSEMBLY OF LAMINAR PIEZOCERAMIC ELEMENTS AND AN ASSEMBLY PRODUCED THEREBY

PIEZOELECTRIC ASSEMBLY.

A process for producing a stack of laminar piezoceramic elements, wherein the piezoceramic elements have a surface roughness of Rm < 5 mu m. and Ra 0.15 to 0.5 mu m., electrode layers, formed from a relatively hard conducting material, are deposited on a face of each element, each layer extending to an edge of the element, the elements are formed into a stack by repeating a process of applying an interrupted layer of adhesive, having a viscosity of 100-500 mPa.S, to a face of a first element, pressing a second element onto the adhesive coated face of the first element, with an electrode layer sandwiched between said elements, and holding the elements pressed together under a pressure of 0.5-1 mPa until the adhesive hardens and, thereafter, forming electrical contacts connected to the electrode layers on a side of the stack.