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K. SAMBASIVA RAO1,* , B. TILAK1, K. CH. VARADA RAJULU1, P. MURALI KRISHNA1
0.94(Bi0.5Na0.5)Ba0.06Z0.04T0.96O3 (0.06BNBZT) ceramic has been prepared by conventional solid state reaction method. Effect of simultaneous substitution of Ba2+ (A-site) and Zr4+ (B-site) in Na0.5Bi0.5TiO3 (NBT) on structure, dielectric, impedance and conductivity (35-6000C & 45Hz -5MHz) have been studied. X-ray diffraction studies indicated a rhombohedral structure. Crystallite size, strain analysis has been done by Debye - Scherrer and Williamson-Hall technique. The tolerance factor of 0.81 indicated the stable Perovskite structure of the material. Relaxor type behaviour is reveled by diffuse phase transition (γ = 1.45) and the frequency dependence of Tm has been modeled through Vogel-Fulcher relation. Impedance analysis showed the non-Debye type relaxation. Conductivity in the material followed the Jonscher’s law, σ =σ0+Aωn. The theoretical values of ε1 computed using the ‘A(T)’ and ‘n(T)’ (0<n<1) parameters are well fitted with experimental curves. The activation energies from different formalism confirmed the ionic type conduction in material the influence of and oxygen vacancies..
(Na, Ni) TiO3, Ceramic, Relaxor.
K. SAMBASIVA RAO, B. TILAK, K. CH. VARADA RAJULU, P. MURALI KRISHNA, Relaxor behavior of (Na0.5 Bi0.5) TiO3 Ceramic with simultaneous substitution of Ba2+ and Zr4+, Optoelectronics and Advanced Materials - Rapid Communications, 4, 5, May 2010, pp.671-680 (2010).
Submitted at: March 1, 2010
Accepted at: May 20, 2010
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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