Dielectric properties of Ag(Nb1−xTa x)O3 and Bi2O3 Doped Ag(Nb1−xTa x)O3 ceramics

Xiuying Guo; Mi Xiao; Wei Ding; Xiawan Wu; Zhisheng Zhang

doi:10.1007/s11595-006-3518-z

Journal of Wuhan University of Technology Materials Science Edition ›› 2007, Vol. 22 ›› Issue (3) : 518 -521. DOI: 10.1007/s11595-006-3518-z

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Dielectric properties of Ag(Nb_1−xTa_x)O₃ and Bi₂O₃ Doped Ag(Nb_1−xTa_x)O₃ ceramics

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Abstract

Dielectric properties of Ag(Nb_1−xTa_x)O₃ and Bi₂O₃ doped Ag(Nb_1−xTa_x)O₃ solid solutions were investigated. The results show that with the increase of Ta content (x), the sintering temperature increased, and the dielectric loss (tanδ) and the temperature coefficient (α_c) decreased. Ag(Nb_1−xTa_x)O₃ (x=0.4) ceramics sintered at 1 100°C had the highest permittivity (516.8) and a lower tan° (0.0021) at 1 MHz, and its temperature coefficient was about 191 ppm/°C. The sintering temperature of Ag(Nb_1−xTa_x)O₃ (x=0.4) was lowered by the addition of Bi₂O₃, and its dielectric properties were improved. Ag(Nb_0.6Ta_0.4)O₃ ceramics with 2.5 wt% Bi₂O₃ addition presented the optimum dielectric properties (ε=566, tanδ= 0.0007 and α_c≈0ppm/°C) (1 MHz).

Keywords

Ag(Nb_1−xTa_x)O₃ / doping / dielectric properties

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Xiuying Guo, Mi Xiao, Wei Ding, Xiawan Wu, Zhisheng Zhang. Dielectric properties of Ag(Nb_1−xTa_x)O₃ and Bi₂O₃ Doped Ag(Nb_1−xTa_x)O₃ ceramics. Journal of Wuhan University of Technology Materials Science Edition, 2007, 22(3): 518-521 DOI:10.1007/s11595-006-3518-z

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