Influence of additives on the microwave dielectric properties of Ca[(Li1/3Nb2/3)0.92Zr0.08]O3−δ ceramics

ABSTRACT: The effects of B2O3 on the sinterability and microwave dielectric properties of Ca[(Li1/3Nb2/3)0.92Zr0.08]O3−δ ceramics were investigated. The doping of B2O3 can effectively reduce the sintering temperature by 150∼200ºC. The temperature coefficient of resonator frequency τf increased with an increase of B2O3 content and sintering temperature. When the B2O3 content of 2 wt% was added, the optimum microwave dielectric properties: εr = 29.5, Qf = 16520 GHz and τf = −4.7 × 10−6/ºC were obtained at the sintering temperature of 950ºC.