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

• 作者: Haiquan WANG Shixuan LI Kangguo WANG Xiuli CHEN Huanfu ZHOU
• 来源期刊: 先进陶瓷（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: Research Article
• 页码范围: 1282-1290
• 页数: 9页
• 语种: 英文

摘要

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.