The Bending Strength and Microwave Properties of <i>x</i>Al<sub>2</sub>O<sub>3</sub>+ (1-<i>x</i>) BaO-Al<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub>-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 Al2O3on the microstructure, mechanical properties and electrical properties of BaO-Al2O3-ZnO-B2O3-SiO2glass-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 BaAl2Si2O8increased first and then decreased with the increase of Al2O3content. It is found that the formation of phase BaAl2Si2O8contributes to strong bending strength. ThexAl2O3+ (1-x) BaO-Al2O3-SiO2-ZnO-B2O3glass-ceramics sintered 2h at 920°C has the excellent microwave dielectric properties atx=0.4,εr=7.4,tanσ=1.49×10-3at 13.5GHz,τf=-42.67ppm/°C, flexural strength= 184MPa.