Abstract
Piezoelectric ceramics have been used for a little over thirty years. The first piezoelectric ceramic was barium titanate and it is still used. The lead titanate ceramics were introduced about 1955 and quickly became the most widely used piezoelectric material. Compositions were developed for many specific applications, as the strength of ferroelectricity in lead titanate zirconate allowed major chemical modification. The development and characteristics of these materials are described, and applications are reviewed. Major emphasis is placed on consumer applications, as it is, these that account for the major business in piezoelectric ceramic materials. Other more specialized applications are reviewed briefly, and piezoelectric ceramics developed for these applications are discussed.
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