Abstract
The effects of H3BO3 addition on the sintering temperature, microstructure and microwave dielectric properties of Li2ZnTi3O8 ceramics were investigated. With H3BO3 addition, the densification of Li2ZnTi3O8 ceramics was improved significantly, the sintering temperature was lowered effectively, and the τf was adjusted to shift toward zero direction. In the case of 1.0wt.% H3BO3 addition, the value of εr and Q×f reached maximum. With further H3BO3 addition, the dielectric properties were degraded due to the inferior microstructure. With 1.0wt.% H3BO3, the Li2ZnTi3O8 ceramics sintered at 880°C for 4h showed excellent microwave dielectric properties of εr=25.9, Q×f=50,200GHz, and τf=−6.8ppm/°C.
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