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Investigations of Microwave Absorption in Insulating Dielectric Ionic Crystals Including the Role of Point Defects and Dislocations

Published online by Cambridge University Press:  10 February 2011

Benjamin D.B. Klein ,
Binshen Meng ,
Samuel A. Freeman ,
John H. Booske  and
Reid F. Cooper
Benjamin D.B. Klein
Affiliation:
Department of Electrical and Computer Engineering
Binshen Meng
Affiliation:
Department of Electrical and Computer Engineering
Samuel A. Freeman
Affiliation:
Materials Science Program University of Wisconsin, Madison, WI 53706
John H. Booske
Affiliation:
Department of Electrical and Computer Engineering Materials Science Program University of Wisconsin, Madison, WI 53706
Reid F. Cooper
Affiliation:
Department of Materials Science and Engineering Materials Science Program University of Wisconsin, Madison, WI 53706
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Abstract

A theoretical model of microwave absorption in linear dielectric (non-ferroelectric) ionic crystals that takes into account the presence of point defects was synthesized and verified using NaCl single crystals. In the next stage of this research, we will introduce a controlled density of dislocations into the single crystal NaCl samples and study the effect on the microwave absorption mechanisms (ionic conduction, dielectric relaxation and multi-phonon processes) both theoretically and experimentally. Qualitative outlines of this modified theory are presented. The loss factor ε’ has been measured in the dislocation-free case by a cavity resonator insertion technique and the experimental results are in good agreement with the theoretical model. We describe the sample preparation technique that will be used to produce a controlled dislocation density in single crystal samples that will also be studied in our cavity resonator insertion system.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 430: Symposium O – Microwave Processing of Materials V , 1996 , 397
Copyright
Copyright © Materials Research Society 1996

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References

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