Dielectric properties of (Ag_xNa_1−x)(Nb_yTa_1−y)O₃ system prepared by liquid method

Abstract

The dielectric properties of (Ag_xNa_1−x)(Nb_yTa_1−y)O₃ were investigated, and its dielectric loss and capacitance were measured. The dielectric properties of nanometer (Ag_xNa_1−x)(Nb_yTa_1−y)O₃ ceramic prepared by liquid method were better than that by conventional solid method. The average grain size of the nanometer powder(34 nm) obtained by citrate-gel method was small near 500 nm and homogeneous and the microstructure was dense and uniform. In addition, the sintering temperature had a great effect on properties. The dielectric properties of resultant samples were as follows: ɛ>500, tgδ<6×10⁻⁴, a _c< 10 ppm /°C, ρ _v>1 012 Ω·cm.

Keywords

liquid method / nanometer / (Ag_xNa_1−x)(Nb_yTa_1−y)O₃ / citrate

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