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Temperature Dependence of the Microwave Dielectric Behavior of Selected MaterialsA very sensitive thermal bath is designed to study the effect of temperature on the microwave dielectric response of a sample of nickel oxide and cobalt oxide. The sample under study is placed in a microwave resonant cavity in the TE(sub 011) mode. The perturbations of the electric field are recorded in terms of the frequency shifts and the width changes of the microwave resonant signal as seen on the oscilloscope. The real and imaginary parts of the dielectric constant are calculated by using the values of the frequency shifts and width changes in the Slater's perturbation equations. The dielectric behavior of nickel oxide and cobalt oxide and also their mixture is studied at a microwave frequency of 9.2 GHz as a function of temperature. A computer program is written to analyze the dielectric constant values at different temperatures. The resonant cavity seems to be very sensitive in studying the dielectric relaxation mechanism in these materials. The dielectric behavior is also analyzed using Debye's equations, and relaxation times for these materials are calculated at microwave frequencies.
Document ID
19960052146
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Dahiya, Jai N.
(State Univ. of Southeast Missouri Cape Girardeau, MO United States)
Date Acquired
August 17, 2013
Publication Date
May 1, 1996
Publication Information
Publication: National Educators' Workshop: Update 95. Standard Experiments in Engineering Materials Science and Technology
Subject Category
Chemistry And Materials (General)
Accession Number
96N35369
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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