Electrical transport properties of ceramics

The LiNiV O4 fine powder has been synthesized by chemical “pyrophoric reaction process”. The formation of LiNiV O4 is confirmed by X-ray diffraction analysis. X-ray analysis shows that the compound has cubic crystal structure with lattice constant ( a = 8.2243 ( 2 ) Å ). Microstructure of the sintered pellet is identified by taking the field emission scanning electron microscopy (FE-SEM) pictures, which reveals the grain size as ∼0.2–2 μm. Electrical properties are measured using complex impedance spectroscopy technique. Bulk contribution to electrical response is identified by the analysis of complex plane diagrams. The activation energy calculated from σ d c vs 103/T graph is ∼0.06 eV (25–225 ∘C) and ∼0.55 eV (225–375 ∘C). Complex modulus study shows non-Debye type (polydispersive) conductivity relaxation in the compound.