Study on the Dielectric Properties of(Ba,Sr)TiO3 Dielectric Ceramics Doped with Bi2(SnO3)3
A ceramic composite of Bi2(SnO3)3(BSO)doped with(Ba0.71Sr0.29)TiO3((Ba,Sr)TiO3 or BST)was prepared by the conventional solid-state method.The influence of the BSO doping amount on the dielectrical property,phase composition and microstructure of BST ceramics was investigated by XRD and SEM techniques.The experiment results showed that with increasing BSO doping concentration,the dielectric constant of BST-based ceramics initially increases,then decreases,followed by another increase before decreasing again,while the dielectric loss first increases and then decreases.When the BSO doping amount is 2.0 wt％,the BST-based dielectric ceramics possess favorable dielectric properties:a dielectric constant of 5430,a dielectric loss tangent of 0.0145,AC/C of+20.64％,and-45.58％.The BSO doped BST-based dielectric ceramics maintain a perovskite structure,and the BSO doping serves to shift and broaden the peaks.
Barium and strontium titanateBi2(SnO3)3Dielectric propertiesDopingCeramics
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