Accession Number : ADA132136

Title :   Targeted Basic Studies of Ferroelectric and Ferroelastic Materials for Piezoelectric Transducer Applications.

Descriptive Note : Final rept. 1 Dec 82-31 Dec 83,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK MATERIALS RESEARCH LAB

Personal Author(s) : Cross,L E ; Newnham,R E ; Barsch,G R ; Biggers,J V

PDF Url : ADA132136

Report Date : Mar 1983

Pagination or Media Count : 320

Abstract : The work reported covers the fifth and final year of the program of Targeted Basic Studies of Ferroelectric and Ferroelastic Materials for Piezoelectric Transducer Applications. Major achievements include the development of a physical approach to understanding active composites, leading to the development of several new families of PZT:polymer piezoelectric composites for hydrophone application. New advances in the phenomenology and microscopic theory of electrostriction, and the evolution of a new family of high strain ferroelectric relaxor materials for practical application. New basic understanding of the polarization mechanisms in ferroelectric relaxors has been aided by the study of order-disorder of the cation arrangement in lead scandium tantalate, and the results correlate well with studies of relaxor behavior, and of shape memory effects in PLZT ceramics. Low temperature studies on pure and doped PZTs have given the first clear indication of the intrinsic (averaged) single domain in response and correlate exceedingly well with earlier phenomenological theory. Crystal growth and ceramic processing studies have developed 'hand-in-hand' with program needs providing new forms of conventional materials, new grain oriented structures and single crystals.

Descriptors :   *Piezoelectric materials, *Piezoelectric transducers, *Single crystals, *Ceramic materials, *Ferroelectric materials, *Elastic properties, Composite materials, Grain structures(Metallurgy), Hydrophones, Polymers, Electrostriction, Scandium compounds, Methodology, Crystal growth, Lead compounds, Glass, Zirconates, Low temperature, Approach, Shape, Polarization, Processing, Perovskites, Resonant frequency, Titanates, Strain(Mechanics)

Subject Categories : Electrical and Electronic Equipment
      Ceramics, Refractories and Glass
      Crystallography
      Electricity and Magnetism
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE