Authors: Lingxia Li Sai Li Zhengdong Gao
Publish Date: 2015/04/03
Volume: 26, Issue: 7, Pages: 5037-5042
Abstract
The effects of B2O3 additive on the phase formation the microstructures and the microwave dielectric properties of 10 mol LaAlO3doped 095MgTiO3–005CaTiO3 ceramics were investigated The B2O3 addition lowered the sintering temperature of 10 mol LaAlO3doped 095MgTiO3–005CaTiO3 ceramics effectively to 1125 °C due to the liquidphase effect The microwave dielectric properties were found to strongly correlate with the sintering temperature as well as the amount of B2O3 addition According to the XRD patterns the secondary phase CaLa4Ti4O15 formed with more than 2 wt B2O3 addition which decreased the dielectric constant but promoted the Q × f value of the ceramics With 3 wt B2O3 addition a maximum Q × f of 57000 GHz at 8 GHz associated with a dielectric constant of 203 and a τ f value of −72 × 10−6/°C was achieved for the samples sintered at 1125 °C for 4 h
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