Study of BaO–Nd2O3–TiO2 ceramics doped with Li2O–ZnO–B2O3 glass for LTCC technology

It is necessary to use high-permittivity dielectric ceramics to realize various distributed microwave components in low-temperature co-fired ceramics (LTCC) structures. In this study, the Ba3.75Nd6.5Sm3Ti17.5(Cr0.5Nb0.5)0.5O54 (BNSTCN) ceramic was doped by Li2O–ZnO–B2O3 (LZB) glass to get the densification temperatures of lower than 960 °C . The effects of the LZB glass content on the wetting behavior, densification, and microwave properties were examined. The results showed that the BNSTCN + 4-wt% LZB sample sintered at 950 °C had outstanding microwave dielectric properties: dielectric constant (εr) of 67.5, quality factor (Q×f) of 5,186 GHz, and temperature coefficient of resonance frequency (τf) of − 0.6 ppm/°C. Besides, the BNSTCN + 5-wt% LZB sample sintered at 950 °C also presented good microwave dielectric properties: ɛr = 67.9, Q×f = 4,733 GHz, and τf = − 3.6 ppm/°C.