LEAD-ZIRCONATE-TITANATE CERAMIC HAVING TEXTURING, METHOD FOR THE PRODUCTION OF THE CERAMIC, AND USE OF THE CERAMIC

摘要

The invention relates to a lead-zirconate-titanate ceramic having texturing, comprising textured nuclei containing barium-titanate crystallites, wherein the barium-titanate crystallites have a substantially equal crystal characteristic, including form anisotropy, and an (001) orientation in the lead-zirconate-titanate ceramic. The invention further provides a method for the production of a PZT ceramic comprising the following steps: a) providing the barium-titanate crystallite, b) mixing the barium-titanate crystallite and a starting material of the lead-zirconate-titanate into a ceramic green body such that the barium-titanate crystallites in the green body have an (001) orientation, and c) heat-treating the green body. The heat treatment comprises calcination and sintering of the piezo-ceramic composition. The barium-titanate crystallites are used in a “template grain growth process” (TGG) as crystallization nuclei. The piezo-ceramic component is, for example, an ultrasonic transducer or a piezo-ceramic bender actuator. In particular, the piezo-ceramic component is a multilayer piezo actuator, which is used to actuate a fuel valve of an internal combustion engine of a motor vehicle.