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1 May 1994 Processing and characterization of functionally gradient ceramic materials
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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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michelina E. O'Day, Louise C. Sengupta, E. Ngo, S. Stowell, and R. Lancto "Processing and characterization of functionally gradient ceramic materials", Proc. SPIE 2189, Smart Structures and Materials 1994: Smart Materials, (1 May 1994);


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