Accession Number : AD0714494

Title :   A New Composite Ceramic Piezoelectric Transducer Material.

Descriptive Note : Technical memo.,

Corporate Author : INTERAND CORP ROCKVILLE MD

Personal Author(s) : Lester,William W.

Report Date : 01 NOV 1970

Pagination or Media Count : 11

Abstract : A new whisker reinforced piezoelectric ceramic was made which exhibits good properties as a trasducer material. The most successful material to date is a lead zirconate titanate composite with a sapphire whisker additive, prepared by a cold press and sinter technique. Measurement of the dielectric permittivity, dielectric loss tangent, electromechanical coupling factor, and mechanical Q are reported for some of these first available samples. Indications are that whisker containing samples undergo different aging processes than nonwhisker containing samples, as indicated by the activation energy for domain wall motion. Measurements of the pyroelectric effect indicate that the whisker containing samples are under large compressive stresses at room temperature. Some comments on possible advantageous properties of this new material are presented. (Author)

Descriptors :   (*PIEZOELECTRIC TRANSDUCERS, *COMPOSITE MATERIALS), CERAMIC MATERIALS, REINFORCING MATERIALS, WHISKERS(CRYSTALS), LEAD COMPOUNDS, ZIRCONATES, TITANATES, SAPPHIRE, DIELECTRIC PROPERTIES

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE