Abstract
This article aims to investigate the effect of Al2O3 in borosilicate glass on the sintering densification and properties of the borosilicate glass/Al2O3 LTCC composites. A series of CaO–Al2O3–B2O3–SiO2 (CABS) glass with different concentrations of Al2O3 was synthesized, as well as the CABS glass/Al2O3 LTCC composites. The influence of Al2O3 on the sintering densification, phase composition, microstructures and properties of the CABS glass/Al2O3 LTCC composites was then systematically investigated. Result indicates that a proper amount of Al2O3 in CABS glass not only can strengthen the structural stability of the borosilicate glass, but also can promote the sintering densification and improve the properties of the glass/ceramic composites. CABS glass/Al2O3 composites prepared with CABS glass of 4 wt.% Al2O3 sintered at 875 °C exhibits excellent properties of a sintering density of 3.13 g/cm3, a Z axial shrinkage of 15.5%, a dielectric constant (εr) of 8.08, a dielectric loss (tanδ) of 0.9 × 10–3 (at 7 GHz), a coefficient of thermal expansion (CTE) of 5.35 ppm/°C, a flexural strength of 206 MPa, demonstrating its great potential for LTCC applications.
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Acknowledgements
The authors are grateful to the support of the Priority Academic Program Development of Jiangsu Higher Education Institution (PAPD), Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, and the Program for Innovative Research Team in University of Ministry of Education of China (No. IRT_15R35).
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Luo, X., Tao, H., Li, P. et al. Properties of borosilicate glass/Al2O3 composites with different Al2O3 concentrations for LTCC applications. J Mater Sci: Mater Electron 31, 14069–14077 (2020). https://doi.org/10.1007/s10854-020-03961-z
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DOI: https://doi.org/10.1007/s10854-020-03961-z