Composite Material Based on Oxyfluoride Barium Boron-Aluminosilicate Glass and Al2o3 for LTCC Technology

Abstract

This article examines the synthesis and properties of a composite ceramic material based on a glass with the composition 31.0BaO – 30.0B₂O₃ – 15.0Al₂O₃ – 7.0SiO₂ – 6.8MgO – 5.9ZnO – 4.3MgF₂ (mol.%) and an Al₂O₃ filler. The composite ceramic, prepared with an initial glass-to-Al₂O₃ mass ratio of 60 : 40 and sintered at 875°C, exhibits a relative permittivity ε_r of 8.62 and a loss tangent tan δ of 12.1 × 10 ^–4 at 1 MHz. The material demonstrates a flexural strength of 117.5 MPa, a coefficient of linear thermal expansion (CLTE) of 69.7 × 10 ^–7 K ^{– 1}, and chemical compatibility with silver electrodes. These properties suggest its applicability in low-temperature co-fired ceramic (LTCC) technology.