Effects of Sb2O3 Addition on Dielectric Properties of Barium Strontium Titanate Based Ceramics
The dielectric properties of Sb2O3-doped (Ba0.732Sr0.26Nd0.008)TiO3.004 ceramics fabricated by conventional solid state method were investigated. The structure was identified by X-ray diffraction method and scanning electron microscope was also employed to observe the surface morphologies. It is confirmed that Sb2O3-doped (Ba0.732Sr0.26Nd0.008)TiO3.004 ceramics exhibit perovskite structure and with increasing Sb2O3 content Ba6Ti17O40 (space group C2/c (15) ) forms as a secondary phase. The experimental results reveal that the addition of Sb2O3 into (Ba0.732Sr0.26Nd0.008)TiO3.004 ceramics reduce the dielectric constant and Curie temperature due to the substitution for A/B-sites with Sb3+ ions. The standing voltage increases with increasing Sb2O3 content while the dielectric loss and resistivity initially decrease and then increase with the increase of Sb2O3 concentration. The temperature dependence of dielectric properties at different frequencies was studied as well. It indicates that the tetragonal-cubic phase transition peak is suppressed as the Sb2O3 content increases and the peak value reduces with the increase of frequency.
C. Zhang and Y. F. Qu, "Effects of Sb2O3 Addition on Dielectric Properties of Barium Strontium Titanate Based Ceramics", Applied Mechanics and Materials, Vols. 138-139, pp. 1280-1287, 2012