Low-temperature sintering and microwave dielectric properties of [Ca0.6(Li0.5Nd0.5)0.4]0.45Zn0.55TiO3 ceramics

The effects of ZnO–H3BO3 on the sinterability and microwave dielectric properties of [Ca0.6(Li0.5Nd0.5)0.4]0.45Zn0.55TiO3 (CLNZT) ceramics were investigated. With the addition of ZnO–H3BO3 from 1.0 to 4.0 wt.%, Qf value of CLNZT sintered at 900 °C were as good as those of pure CLNZT sintered at 1150 °C. This is due to the enhancement in density of CLNZT by liquid phase sintering by the addition of ZnO–H3BO3. Dielectric constant (K) was increased remarkably with ZnO–H3BO3 content for the specimens sintered at temperatures lower than 950 °C. Typically, K of 42, Qf of 10 300(GHz), TCF of 19.5 ppm °C−1 were obtained for CLNZT with 2 wt.% 0.33ZnO–0.67H3BO3 sintered at 875 °C for 4 h.