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Journal of Materials Science: Materials in Electronics
Published in: Journal of Materials Science: Materials in Electronics 20/2018

10-08-2018

Structure and microwave dielectric properties of a novel low-firing Ba1−xSrxCo2V2O8 ceramics

Authors: Zhenjun Qing, Zhenguo Ji

Published in: Journal of Materials Science: Materials in Electronics | Issue 20/2018

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Abstract

A low-firing BaCo2V2O8 ceramic was prepared by solid-state reaction and its microwave dielectric properties were reported for the first time. The sample calcined at 700 °C exhibited a low relative dielectric constant (εr 16.7) and a high quality factor (Q(u) × f: 73,200 GHz), as well as a poor temperature coefficient of resonator frequency (τf − 41 ppm/°C). In order to obtain a near-zero τf value, Ba1−xSrxCo2V2O8 (x = 0–0.25) ceramics were synthesized by replacing Ba2+ with Sr2+ and the relationship between crystal structure and microwave dielectric properties were studied. The epsilon(r) decreased with the decrease of ionic polarization. The drop in the packing fraction worsened the Q(u) × f values. The varieties in τf values were considered to be closely related to A-site bond valence. Specimen (x = 0.25) fired at 730 °C possess superior microwave dielectric properties: εr 14.6, Q(u) × f = 52,120 GHz and τf − 1.6 ppm/°C.
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Metadata
Title
Structure and microwave dielectric properties of a novel low-firing Ba1−xSrxCo2V2O8 ceramics
Authors
Zhenjun Qing
Zhenguo Ji
Publication date
10-08-2018
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 20/2018
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-018-9832-3

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