La2O3-B2O3-TiO2 Glass/BaO-Nd2O3-TiO2 ceramic for high quality factor low temperature co-fired ceramic dielectric

A conventional BaO–Nd2O3–TiO2 ceramic of microwave dielectric material was added to rare-earth derived borate glasses (La2O3–B2O3–TiO2) for use as LTCC (low temperature co-fired ceramic) materials. The sintering behavior, phase evaluation, and microwave dielectric properties were investigated. It was found that increasing the sintering temperature from 750 to 850 °C led to increases in shrinkage and microwave dielectric properties (≈15 for ɛr , >10,000 GHz for Q*f0 and >94 ppm/ °C for τf at 7–8 GHz for resonant frequency). The results suggest that a composite with suitable additives for τf could feasibly be developed as a material for LTCC applications.