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(Ba1−xSrx)4(Sm0.4Nd0.6)28/3Ti18O54 (x = 0.02, 0.04, 0.06, 0.08, 0.1) solid solutions were prepared by the conventional solid-state reaction process. It was found that (Ba1−xSrx)4(Sm0.4Nd0.6)28/3 Ti18O54 ceramics are fully composed of BaSm2Ti4O12 and BaNd2Ti5O14 phases for all the compositions. The increasing x value (0.02 ≤ x ≤ 0.1) in (Ba1−xSrx)4(Sm0.4Nd0.6)28/3Ti18O54 ceramics can not only obtain high Q × f value but also effectively enhance the permittivity ( εr). The (Ba1−xSrx)4(Sm0.4Nd0.6)28/3Ti18O54 ceramic with x = 0.08, sintered at 1440 ℃ for 4 h, shows excellent microwave dielectric properties of permittivity ( εr) ≈ 93.19, quality factor (Q × f) ≈ 9770.14 GHz (at 3.415 GHz), and almost near-zero temperature coefficient of resonant frequency ( τf) ≈ +4.56 ppm/℃.


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Microstructures and microwave dielectric properties of (Ba1−xSrx)4(Sm0.4Nd0.6)28/3Ti18O54 solid solutions

Show Author's information Xianpei HUANGaXinyu LIUaFei LIUb( )Changlai YUANa,cJingjing QUdJiwen XUaChangrong ZHOUaGuohua CHENa
School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China
Department of Information Engineering, Guilin University of Aerospace Technology, Guilin 541004, China

Abstract

(Ba1−xSrx)4(Sm0.4Nd0.6)28/3Ti18O54 (x = 0.02, 0.04, 0.06, 0.08, 0.1) solid solutions were prepared by the conventional solid-state reaction process. It was found that (Ba1−xSrx)4(Sm0.4Nd0.6)28/3 Ti18O54 ceramics are fully composed of BaSm2Ti4O12 and BaNd2Ti5O14 phases for all the compositions. The increasing x value (0.02 ≤ x ≤ 0.1) in (Ba1−xSrx)4(Sm0.4Nd0.6)28/3Ti18O54 ceramics can not only obtain high Q × f value but also effectively enhance the permittivity ( εr). The (Ba1−xSrx)4(Sm0.4Nd0.6)28/3Ti18O54 ceramic with x = 0.08, sintered at 1440 ℃ for 4 h, shows excellent microwave dielectric properties of permittivity ( εr) ≈ 93.19, quality factor (Q × f) ≈ 9770.14 GHz (at 3.415 GHz), and almost near-zero temperature coefficient of resonant frequency ( τf) ≈ +4.56 ppm/℃.

Keywords:

tungsten bronze type, high permittivity, microwave dielectric properties
Received: 10 May 2017 Revised: 12 January 2016 Accepted: 12 July 2017 Published: 02 March 2017 Issue date: March 2017
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Publication history

Received: 10 May 2017
Revised: 12 January 2016
Accepted: 12 July 2017
Published: 02 March 2017
Issue date: March 2017

Copyright

© The author(s) 2016

Acknowledgements

Financial supports of the National Natural Science Foundation of China (Grant No. 11464006) and the Middle-aged and Young Teachers in Colleges and/or Universities in Guangxi Basic Ability Promotion Project of China (Grant No. KY2016YB534) are gratefully acknowledged by the authors.

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