Influence of ZrO₂ on Dielectric Properties of Ba_1-xSr_xTiO₃ Ceramics

Abstract:

Ba1-xSrxTiO3 ceramic (BST) was one of the promising materials applied in phased array antennas due to its excellent dielectric properties. Ba1-xSrxTiO3 ceramic was prepared by traditional solid state reactions. Effects of different amount of ZrO2 as additive upon the dielectric properties of BST were investigated. The analyzed results showed that, as the amount of ZrO2 increasing, the dielectric constant and temperature dependence of dielectric constant of this ceramic both decreased, while its dielectric tunability kept high value.

• Periodical: Key Engineering Materials (Volumes 280-283)
• Pages: 79-80
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.280-283.79
• Online since: February 2007
• Authors: Hao Xue, He Ping Zhou, Chen Ai
• Keywords: Ba_1-xSr_xTiO₃, Dielectric Property, Tunability, Zro₂

References

[1] A.K. Tagantsev, V.O. Sherman and K.F. Astafiev: J. Electroceram. Vol. 11 (2003), p.5.

[20] 40 60 80.

2000 4000 6000 8000 10000 12000 Permittivity Temperature (oC).

% ZrO2.

[1] % ZrO2.

[2] % ZrO2.

[5] % ZrO2.

[10] % ZrO2 Fig. 3 Temperature dependence of permittivity at 10 kHz for the BST system.

300 600 900 1200 2000 3000 4000 5000 0 % ZrO2.

[1] % ZrO2.

[2] % ZrO2.

[5] % ZrO2.

[10] % ZrO2 Permittivity E (V/mm) Fig. 4 Relative dielectric constant of BST system mixed with ZrO2 as a function of applied DC bias fields.