The Bending Strength and Microwave Properties of xAl₂O₃+ (1-x) BaO-Al₂O₃-B₂O₃-SiO₂-ZnO Glass-Ceramics

Abstract:

In this work, a new microwave dielectric material for LTCC applications, xAl₂O₃+ (1-x) BaO-Al₂O₃-B₂O₃-SiO₂-ZnO (x=0.3, 0.4, 0.5 and 0.6) glass-ceramics, was synthesized. The effect of Al₂O₃ on the microstructure, mechanical properties and electrical properties of BaO-Al₂O₃-ZnO-B₂O₃-SiO₂ glass-ceramics was studied in this paper. The crystallinity was studied by jade6.5 software using the whole pattern fitting method. The XRD analysis showed that the content of BaAl₂Si₂O₈ increased first and then decreased with the increase of Al₂O₃ content. It is found that the formation of phase BaAl₂Si₂O₈ contributes to strong bending strength. The xAl₂O₃+ (1-x) BaO-Al₂O₃-SiO₂-ZnO-B₂O₃ glass-ceramics sintered 2h at 920°C has the excellent microwave dielectric properties at x=0.4, ε_r=7.4, tanσ=1.49×10^-3 at 13.5GHz, τ_f=-42.67ppm/°C, flexural strength= 184MPa.

• Periodical: Key Engineering Materials (Volume 842)
• Pages: 186-192
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.842.186
• Online since: May 2020
• Authors: Tian Ying Qin, Chao Wei Zhong*, Yang Qin, Shu Ren Zhang
• Keywords: Glass-Ceramic, LTCC Material, Mechanical Properties, Microwave Dielectric Properties

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