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http://dx.doi.org/10.12989/amr.2013.2.3.173

Structural, FTIR and ac conductivity studies of NaMeO3 (Me ≡ Nb, Ta) ceramics  

Roy, Sumit K. (Department of Physics, St. Xavier's College)
Singh, S.N. (University Department of Physics, Ranchi University)
Kumar, K. (Refractory Division, RDCIS, SAIL)
Prasad, K. (University Department of Physics, T. M. Bhagalpur University)
Publication Information
Advances in materials Research / v.2, no.3, 2013 , pp. 173-180 More about this Journal
Abstract
Lead-free complex perovskite ceramics $NaMeO_3$ ($Me{\equiv}Nb$, Ta) were synthesized using conventional solid state reaction technique and characterized by structural, FTIR and electrical (dielectric and ac conductivity) studies. The crystal symmetry, space group and unit cell dimensions were determined from the experimental results using FullProf software. XRD analysis of the compound indicated the formation of single-phase orthorhombic structure with the space group Pmmm (47). Dielectric studies showed the diffuse phase transition at $394^{\circ}C$ for $NaNbO_3$ and $430^{\circ}C$ for $NaTaO_3$. Ac conductivity in both the compounds follows Jonscher's power law.
Keywords
$NaNbO_3$; $NaTaO_3$; perovskite; dielectric properties; lead-free; electroceramic;
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