Structural and Dielectric Properties of ZnO Added (Na1/2Bi1/2)TiO3 Ceramics

Abstract

Abstract: Structural and dielectric properties of polycrystalline samples of lead-free (1-x)(Na_1/2Bi_1/2)TiO_3-xZnO, prepared using a high-temperature solid-state reaction method, are investigated in the composition range 0 ≤ x ≤ 0.10. Rietveld analyses of X-ray diffraction data indicated the formation of a single-phase hexagonal structure with R3c symmetry. Williamson-Hall approach was applied to estimate the apparent particle size and lattice strain of the compounds. Temperature dependence of dielectric constant showed that the addition of ZnO to (Na_1/2Bi_1/2)TiO₃ shifts the phase transition temperature towards higher side, a property favourable for practical applications of these ceramics. Further, temperature dependent permittivity data provided low temperature coefficient of capacitance (T_CC < 8%) up to 100°C. Furthermore, a decrease in the value of dielectric loss with an increase in ZnO content is observed.

Key words: Lead-free, , Perovskite, , Sodium bismuth titanate, , Ceramic, , Crystal structure, Dielectric properties

Kamini Kumari, Ashutosh Prasad, Kamal Prasad. Structural and Dielectric Properties of ZnO Added (Na_1/2Bi_1/2)TiO₃ Ceramics[J]. J Mater Sci Technol, 2011, 27(3): 213-217.

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Structural and Dielectric Properties of ZnO Added (Na_1/2Bi_1/2)TiO₃ Ceramics

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