Synthesis, microstructure and characterization of Ultra-low permittivity and dielectric loss ZnO-B2O3-SiO2 glass/SiO2 composites for LTCC application

ZnO-B 2 O 3 -SiO 2 /SiO 2 glass-ceramic composites are prepared by solid phase reaction method. The DSC curve of ZnO-B 2 O 3 -SiO 2 glass is analyzed and the effects of ZnO-B 2 O 3 -SiO 2 glass on the density, microwave dielectric properties, phase composition and microstructure of ceramic fillings are investigated. The results show that the sintering temperature of the composites can be reduced to 910 °C by adding ZBS glass. When the addition of ZBS is 65% (wt%), the dielectric properties of the sample are best when the composite is sintered in 910 °C for 1 h (εr = 4.6, tanδ = 4.85 × 10 − 4 at 9.2 GHz, τ f = -13.78 ppm/°C). The prepared ZnO-B 2 O 3 -SiO 2 /SiO 2 composite is promising candidates for LTCC applications.