Piezoelektrische Vorrichtung und Verfahren zum Herstellen derselben

摘要

A number of single crystal domains having crystal orientations different from each other cohere to form one grain, and a number of grains cohere to form a piezoelectric material. When a grain has a size exceeding a certain size, cracks take place in the surface of the grain. Because of generation of the cracks constraining forces from adjacent domains are weak, and a displacement which is substantially the same as a displacement ideal to piezoelectric material can be obtained.