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Crystal structure refinement and microwave dielectric properties of new low dielectric loss AZrNb2O8 (A: Mn, Zn, Mg and Co) ceramics
Vemuri Rama Krishna Murthy
Published in
2013
Volume: 69
   
Issue: 3
Pages: 274 - 277
Abstract
The effects of substituting different cations (Mn, Zn, Mg and Co) at the A-site of AZrNb2O8 compounds on structural parameters such as packing fraction and B-site octahedral distortion were studied using X-ray powder diffraction in conjunction with Rietveld refinement. Variations in the dielectric constant (εr) were explained by the ionic polarizability of the compositions. The quality factor (Q × f) and temperature coefficient of resonant frequency (τf) were correlated with the packing fraction and B-site octahedral distortions (δ) in these compositions, respectively. © 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
About the journal
JournalScripta Materialia
ISSN13596462
Open AccessNo
Concepts (15)
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    CRYSTAL STRUCTURE REFINEMENT
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    IONIC POLARIZABILITIES
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    Low dielectric loss
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    MICROWAVE DIELECTRIC PROPERTIES
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    OCTAHEDRAL DISTORTION
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    Packing fractions
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    Structural parameter
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    TEMPERATURE COEFFICIENT OF RESONANT FREQUENCY
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    Dielectric losses
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    Manganese
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    Natural frequencies
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    Rietveld refinement
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    X ray powder diffraction
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    Zinc
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    Cobalt compounds