Accession Number : ADA328047

Title :   Stress-Enhanced Ferroelectric Materials and Structures.

Descriptive Note : Final rept. 1 Jun 96-14 Jun 97,

Corporate Author : CLEMSON UNIV SC DEPT OF CERAMIC ENGINEERING

Personal Author(s) : Haertling, Gene ; Furman, Eugene ; Li, Guang ; Barron, Bret ; Paradise, William

PDF Url : ADA328047

Report Date : 09 JUL 1997

Pagination or Media Count : 289

Abstract : This report details work performed in the Ceramic Engineering Department of Clemson University over the period from June 1, 1996 to June 14, 1997. The work described in this report covers the final year of a three-year program involving stress-enhanced ferroelectric materials and structures. It is presented in ten parts dealing with Rainbows, Cerambows and electrooptic and ferroelectric thin films, processing, characterization and published work. The Rainbow and Cerambow actuator technologies are relatively recent materials developments involving new processing techniques for preparing pre-stressed piezoelectric and electrostrictive ceramic materials for high displacement actuators. During this period, PLZT Rainbow and Cerambows were characterized with respect to (1) the formation of their distinctive curvature, (2) the grain size dependence of their nonlinear properties, (3) nonlinear piezoelectric behavior, (4) electrostrictive butterfly loops and (5) vibration control and noise suppression applications. Studies of the effect of intelligent processing and externally applied stress on the properties of electrooptic thin films were finalized this period. Properties such as dielectric constant, remanent polarization, coercive field and optical birefringence were found to be highly dependent upon the magnitude and sign (tensile or compressive) of the stress.

Descriptors :   *THIN FILMS, *CERAMIC MATERIALS, *FERROELECTRICITY, POLARIZATION, ELECTROOPTICS, TENSILE STRESS, GRAIN SIZE, DIELECTRIC PROPERTIES, PIEZOELECTRICITY, RESIDUAL STRESS, BIREFRINGENCE, ACTUATORS, NOISE REDUCTION, PRESTRESSING.

Subject Categories : Ceramics, Refractories and Glass
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE