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Proceedings Paper

Processing and characterization of functionally gradient ceramic materials
Author(s): Michelina E. O'Day; Louise C. Sengupta; E. Ngo; S. Stowell; R. Lancto
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Paper Abstract

Tape casting of ceramic materials offers the flexibility of gradually altering the electronic or structural properties of two dissimilar systems in order to improve their compatibility. This research outlines the processing and fabrication of two systems of functionally gradient materials. The systems are both electronic ceramic composites consisting of Ba1-xSrxTiO3 (BSTO) and alumina or a second oxide additive. These composites would be used in phased array antenna systems, therefore, the electronic properties of the material have specific requirements in the microwave frequency regions. The composition of the tapes are varied to provide a graded dielectric constant, which gradually increases from that of air (dielectric constant equals 1) to that of the ceramic (dielectric constant equals 1500). This allows maximum penetration of incident microwave radiation as well as minimum energy dissipation and insertion loss into the entire phase shifting device.

Paper Details

Date Published: 1 May 1994
PDF: 12 pages
Proc. SPIE 2189, Smart Structures and Materials 1994: Smart Materials, (1 May 1994); doi: 10.1117/12.174074
Show Author Affiliations
Michelina E. O'Day, U.S. Army Research Lab. (United States)
Louise C. Sengupta, U.S. Army Research Lab. (United States)
E. Ngo, U.S. Army Research Lab. (United States)
S. Stowell, U.S. Army Research Lab. (United States)
R. Lancto, U.S. Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 2189:
Smart Structures and Materials 1994: Smart Materials
Vijay K. Varadan, Editor(s)

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