Accession Number : ADA299785

Title :   Near Net-Shape Fabrication of Ultrafine Scale Piezoelectric Ceramic/Polymer Composites.

Descriptive Note : Annual rept.,

Corporate Author : MATERIALS SYSTEMS INC CONCORD MA

PDF Url : ADA299785

Report Date : MAR 1995

Pagination or Media Count : 43

Abstract : Over the past two years, Materials Systems Inc. (MSI) has demonstrated that net-shape ceramic injection molding is capable of fabricating extremely fine scale 1-3 and 2-2 piezoelectric ceramic/polymer composites for Navy and commercial applications. In its last report (1), Materials Systems described modifications to its injection molding process that allow net shape forming of 1-3 piezocomposite transducer preforms having <100 micro m wide PZT elements, and outlined several approaches for further developing the process. Using these approaches, MSI has extended the injection molding capability to include ultrafine scale 2-2 composites having element widths as low as 22 micro m, and has continued refining the process and tooling to achieve larger area 1-3 composites, up to 30mm square. The past twelve months have also seen 1-3 piezocomposites injection molded with high PZT volume fraction (approx. 60-80%). Throughout 1993-94, MSI pursued commercialization of these materials, supplying test prototypes under customer funding to both private-sector and Navy composite end-users. As a result, the electro-acoustic properties of these fine-scale composites have been characterized not only by MSI, but also as transducers in customer-proprietary applications. jg p.3

Descriptors :   *POLYMERS, *COMPOSITE MATERIALS, *CERAMIC MATERIALS, *PIEZOELECTRIC MATERIALS, *ULTRAFINES, TEST AND EVALUATION, NAVY, UNDERSEA WARFARE, SHAPE, PROTOTYPES, ACOUSTIC IMAGES, TRANSDUCERS, MINE HUNTING, SONAR, DIVER EQUIPMENT, INJECTION MOLDING, ELECTROACOUSTICS.

Subject Categories : Polymer Chemistry
      Laminates and Composite Materials
      Submarine Engineering
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE