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Research Article | Open Access

Sintering behaviour and microwave dielectric properties of MgO-2B2O3-xwt%BaCu(B2O5)-ywt%H3BO3 ceramics

Haiquan WANG, Shixuan LI, Kangguo WANG, Xiuli CHEN, Huanfu ZHOU( )
Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
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Abstract

This study investigates the bulk density, sintering behaviour, and microwave dielectric properties of the MgO-2B2O3 series ceramics synthesised by solid-state reaction. According to the X-ray diffraction and microstructural analyses, the as-prepared MgO-2B2O3 ceramics possess a single-phase structure with a rod-like morphology. The effects of different quantities of H3BO3 and BaCu(B2O5) (BCB) on the bulk density, sintering behaviour, and microwave dielectric properties of the MgO-2B2O3 ceramics were investigated. Accordingly, the optimal sintering temperature was obtained by adding 30 wt% H3BO3 and 8 wt% BCB. We also reduced the sintering temperature to 825 ℃. Furthermore, the addition of 40 wt% H3BO3 and 4 wt% BCB increased the quality factor, permittivity, and temperature coefficient of resonance frequency of MgO-2B2O3 to 44,306 GHz (at 15 GHz), 5.1, and -32 ppm/℃, respectively. These properties make MgO-2B2O3 a viable low- temperature co-fired ceramic with broad applications in microwave dielectrics.

Keywords

low-temperature co-fired ceramics (LTCC)sintering temperatureMgO-2B2O3H3BO3microwave dielectricstemperature coefficient of resonance frequency

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Journal of Advanced Ceramics
Volume 10 Issue 6,
December 2021
Pages 1282-1290
DOI: 10.1007/s40145-021-0503-0
Cite this article:
WANG H, LI S, WANG K, et al. Sintering behaviour and microwave dielectric properties of MgO-2B2O3-xwt%BaCu(B2O5)-ywt%H3BO3 ceramics. Journal of Advanced Ceramics, 2021, 10(6): 1282-1290. https://doi.org/10.1007/s40145-021-0503-0

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Received: 21 March 2021
Revised: 20 May 2021
Accepted: 27 May 2021
Published: 18 September 2021
© The Author(s) 2021

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