Microwave dielectric properties of Ba(Co0.47+xY0.04Zn0.35)1/3Nb2/3–0.05O3 (x = 0–0.13) ceramics

Bin TANG; Zi-Xuan FANG; He-tuo CHEN; Xiao ZHANG; Shu-ren ZHANG

doi:10.2109/jcersj2.123.399

Regular Issue: Papers

Microwave dielectric properties of Ba(Co_0.47+_xY_0.04Zn_0.35)_1/3Nb_2/3–0.05O₃ (x = 0–0.13) ceramics

Bin TANG, Zi-Xuan FANG, He-tuo CHEN, Xiao ZHANG, Shu-ren ZHANG

著者情報

キーワード: BCZN, Ba₅Nb₄O₁₅, Nonstoichiometry, Dielectric properties, Microwave ceramics

ジャーナルフリー

2015 年 123 巻 1437 号 p. 399-404

DOI https://doi.org/10.2109/jcersj2.123.399

詳細

抄録

The sintering behaviors and microwave dielectric properties of Ba(Co_0.47+_xY_0.04Zn_0.35)_1/3Nb_2/3–0.05O₃ (x = 0–0.13) ceramics were investigated in this paper. The XRD results showed all samples exhibited the main phase Ba(Co_1/3Nb_2/3)O₃–Ba(Zn_1/3Nb_2/3)O₃ (BCZN) and a certain amount of secondary phase Ba₅Nb₄O₁₅. SEM revealed that the microstructure was homogeneous fine grained when x equaled to 0.13. The Co deficiency was found unfavorable to improve the microwave dielectric properties of BCZN ceramics and showed remarkable influence on crystal phases and microstructures. The relatively optimized microwave dielectric properties could be obtained when Co was adequate. At last, the Ba(Co_0.6Y_0.04Zn_0.35)_1/3Nb_2/3–0.05O₃ ceramics well-sintered at 1340°C for 20 h had good microwave dielectric properties of ε_r = 35.0, Q×f = 44,833 GHz and τ_f = −1.1 ppm/°C.

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