Dielectric Properties of Y3+-Doped Ba0.62Sr0.38TiO3 Ceramics
Microstructure and dielectric properties of Ba0.62Sr0.38TiO3 ceramics doped with x mol% (x=0.2~0.6) Y2O3 were investigated. SEM showed that Y3+ can accelerate growth of the grains at first, then turn to inhabit growth of the grains with further addition of Y3+ above 0.8mol%. The experimental results showed that the dielectric constants were improved with the additive amount of Y3+ increasing, if the amount of Y3+ increased continuously, the dielectric constants will drop, whereas the dielectric losses of the samples descended rapidly in the beginning, then went up obviously with further addition of Y3+ above 1.0mol%, the optimal dielectric constant and dielectric loss could reach 6700 and 0.0015 in the room temperature, respectively.
Wei Pan and Jianghong Gong
Y. L. Li et al., "Dielectric Properties of Y3+-Doped Ba0.62Sr0.38TiO3 Ceramics", Key Engineering Materials, Vols. 336-338, pp. 51-53, 2007