Electrical Conduction in Ceramics: Toward Improved Defect Interpretation

  1. Robert N. Schock
  1. Harry L. Tuller

Published Online: 18 MAR 2013

DOI: 10.1029/GM031p0047

Point Defects in Minerals

Point Defects in Minerals

How to Cite

Tuller, H. L. (1985) Electrical Conduction in Ceramics: Toward Improved Defect Interpretation, in Point Defects in Minerals (ed R. N. Schock), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM031p0047

Author Information

  1. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Publication History

  1. Published Online: 18 MAR 2013
  2. Published Print: 1 JAN 1985

ISBN Information

Print ISBN: 9780875900568

Online ISBN: 9781118664070

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Keywords:

  • Mineralogical chemistry—Congresses;
  • Crystals—Defects—Congresses

Summary

Although defects control many physical and chemical parameters of importance in solids, a detailed understanding of their generation and motion is lacking in all but a select number of materials. Methods for determining the defect properties of rather complex systems by following a systematic program of electrical measurements in conjunction with the development of defect chemical models are outlined. Specifically, methods for deconvoluting microstructure from bulk, ionic from electronic and carrier density from mobility contributions to the measured electrical conductivity are emphasized. Examples taken from the recent literature, notably MgO and ThO2-CeO2, are used to demonstrate the principles. Special precautions in applying this approach to rather more complex mineral systems are noted.