(Ag_1-xNa_x)(Nb_1-yTa_y)O₃ Dielectric Ceramic Prepared through Citrate Precursor Method

Abstract:

(Ag1-xNax)(Nb1-yTay)O3 (ANNT) dielectric ceramic material with perovskite structure was prepared through a wet chemical synthetic method. The precursor solution for the material was obtained from the citric acid solutions of different metal oxides or nitrates with exact molar ratio by a sol-process. The precursor solution thus prepared was then heated under an infrared lamp to evaporate the solvent. This period showed a self-propagating combustion behavior. Ceramic powder was obtained after the residue was calcined at a certain temperature. It is proved that ANNT sintered at 1040°C was finely grained. The obtained ceramic showed excellent high frequency dielectric properties with considerable high dielectric constant and rather low dissipation factor under 1MHz.

• Periodical: Key Engineering Materials (Volumes 280-283)
• Pages: 15-18
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.280-283.15
• Online since: February 2007
• Authors: Mi Xiao, Xia Wan Wu, Kuan Xiu Song
• Keywords: ANNT, Citrate Precursor, Large Dielectric Constant, Wet Chemical Method

References

[1] A.A. Volkov, B.P. Gorshunov, G. Komandin, et al.: J. Phys. Condens. Matter Vol. 7(1995), p.785.

[2] M. Valant and D. Suvorov: J. Am. Ceram. Soc. Vol. 82 (1999), p.81.

[3] M. Valant and D. Suvorov: J. Am. Ceram. Soc. Vol. 82 (1999), p.88.

[4] A. Kania and J. Kwapulinski: J. Phys. Condens. Matter Vol. 11 (1999), p.8933.

[5] A. Kania: J. Phys. D Appl. Phys. Vol. 34 (2001), p.1447.

[6] M. Valant, D. Suvorov, C. Hoffmann, et al.: J. Euro. Cearm. Soc. Vol. 21 (2001), p.2647.

[7] A. Kania and S. Miga: Mater. Sci. Eng. B Vol. 86 (2001), p.128.