The effect of the addition of glass on the densification, low temperature sintering, and microwave dielectric properties of the Ca[(Li 1/3Nb2/3)1-x Tix]O 3-δ(CLNT) was investigated. Addition of glass (B 2O3-ZnO-SiO2-PbO system) improved the densification and reduced the sintering temperature from 1150°C to 900°C of Ca[(Li1/3Nb2/3)1-x -Tix]O 3-δ microwave dielectric ceramics. As increasing glass contents from 10 wt% to 15 wt%, the dielectric constants (εr) and bulk density were increased. The quality factor (Q•f0), however, was decreased slightly. The temperature coefficients of the resonant frequency (τf) shifted positive value as increasing glass contents over Ti content is 0.2 mol. The dielectric properties of Ca[(Li1/3Nb 2/3)0.75Ti0.25]O3-δ with 10 wt% glass sintered at 900°C for 3 h were εr = 40 Q•f0 = 11500 GHz, τf = 8, ppm/°C. The relationship between the microstructure and dielectric properties of ceramics was studied by X-ray diffraction (XRD), and scanning electron microscope (SEM).
All Science Journal Classification (ASJC) codes
- Ceramics and Composites