Piezoelectric Ceramic Reproducibility (for 33 Mode Transducer Applications)

摘要

The lack of reproducibility and uniformity of piezoelectric ceramics is a problem that has plagued the Navy for over 30 years. As a result, and the need to specify ceramic for competitive procurements, the Navy has developed specifications that accommodate the variability of the ceramic and assure the transducer will meet performance requirements, be electroacoustically interchangeable, and be intermixable with existing units. A Simplified Guidance Model (SGM) has been developed that provides insight into the relationship between ceramic parameters and transducer design and performance. Experimental data are presented that validate the SGM. New methods are presented to extract the piezoelectric material parameters from geometry dependent 33 mode ceramic rings. A dynamic tester has been developed to certify the performance of a composite ceramic stack.