Processing and Characterization of Functionally Gradient Ceramic Materials

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 Ba(1-x)Sr(x)TiO3 (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 = 1) to that of the ceramic (dielectric constant = 1500). This allows maximum penetration of incident microwave radiation as well as minimum energy dissipation and insertion loss into the entire phase shifting device.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1994
Accession Number
ADA277154

Entities

People

  • Eric H. Ngo
  • L. C. Sengupta
  • M. E. O'day
  • R. Lancto
  • S. Stowell

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Air Force
  • Aluminum Oxides
  • Ceramic Materials
  • Ceramic Matrix Composites
  • Composite Materials
  • Dielectric Permittivity
  • Diffraction
  • Fabrication
  • Laminates
  • Materials
  • Materials Processing
  • Materials Science
  • Measurement
  • Military Research
  • Phased Arrays
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Materials Science and Engineering.
  • Systems Analysis and Design

Technology Areas

  • Microelectronics