Low-temperature sintering and microwave dielectric properties of Li2MgTi3O8 ceramics doped with BaCu(B2O5)

Abstract

The influences of BaCu(B2O5) (BCB) addition on sintering, microstructure and microwave dielectric properties of Li2MgTi3O8 ceramics were investigated using X-ray diffractometry, scanning electron microscopy and microwave dielectric measurements. The experimental results show that a small amount of BaCu(B2O5) addition can effectively reduce the sintering temperature to 900 °C, and induce only a limited degradation of the microwave dielectric properties. Typically, the best microwave dielectric properties of ɛr=24.5, Q×f =24 622 GHz, τf=4.2×10−6 °C−1 are obtained for 1.0% BCB-doped Li2MgTi3O8 ceramics sintered at 900 °C for 3 h. The BCB-doped Li2MgTi3O8 ceramics can be compatible with Ag electrode, which may be a strong candidate for low temperature co-fired ceramics applications.