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

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 εr=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.