Chapter 51. Electrical Properties of SIC-ALN Composites

  1. Waltraud M. Kriven and
  2. Hua-Tay Lin
  1. R. Ou1,
  2. H. Qin1,
  3. R. A. Gerhardt1 and
  4. R. Ruh2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294826.ch51

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4

How to Cite

Ou, R., Qin, H., Gerhardt, R. A. and Ruh, R. (2003) Electrical Properties of SIC-ALN Composites, in 27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4 (eds W. M. Kriven and H.-T. Lin), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294826.ch51

Author Information

  1. 1

    School of Mater. Sci. & Eng., Georgia Institute of Technology, Atlanta, GA 30332-0245

  2. 2

    Universal Technology Corporation, Beavercreek, OH 45432-2600

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2003

ISBN Information

Print ISBN: 9780470375846

Online ISBN: 9780470294826

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Keywords:

  • aluminum nitride;
  • silicon carbide;
  • electrical properties;
  • semiconductor;
  • ceramic compacts

Summary

Aluminum nitride and silicon carbide are two materials with drastically different electrical properties. Silicon carbide is a semiconductor and aluminum nitride is an insulator. In this study, the electrical properties of ceramic compacts containing various ratios of SiC and AIN were studied. The combined use of three different impedance analyzers allows the frequency response to be measured from 10−5 Hz up to 109 Hz. It was found that both SiC and AIN pure samples show an interfacial relaxation. Addition of SiC to AIN results in an extended solid solution which shows an increasing dielectric constant. Addition of AIN to SiC results in a diminishing interfacial polarization, which enhances the low frequency conductivity.