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Applicant:
Indian Institute of Technology (IIT) Patna 
Author:
P. Kour, S. K. Pradhan, Pawan Kumar, S. K. Sinha, M. Kar 
Corresponding Authors:
P. Kour 
DOI #:
https://doi.org/10.1007/s11664-018-6151-7 
Title:
Effect of Nd Doping on Dielectric and Impedance Properties of PZT Nanoceramics 
Journal:
Journal of Electronic Materials 
Year:
2018 
Volume:
47 
Page:
2861–2870 
Keywords:
Diffuse phase transition, ac conductivity, PZT, impedance 
Abstract:
Neodymium-doped lead zirconate tianate, i.e. Pb1xNdxZr0.52Ti0.48O3 (PNZT) ceramics, with x = 0–10 mol.% has been prepared by the sol–gel process. X-ray diffraction pattern at room temperature shows the pyrochlore free phase for all samples. The structural analysis suggests the coexistence of both rhombohedral (R3m space group) and tetragonal (P4 mm space group) crystal symmetries. Scanning electron micrographs of the samples show uniform distribution of grain and grain boundaries. Dielectric constant increases with the increase in neodymium concentration in the crystal lattice. Degree of diffuse phase transition increases with the increase in Nd3+ concentration in the sample. Nd3+ incorporation into the lead zirconatetitanate (PZT) lattice enhances the spreading factor. Interaction between neighbouring dipoles decreases with the increase of Nd3+ in PZT lattice. The conduction mechanism of the sample can be attributed to the overlapping large polar tunnelling. Second-order dielectric phase transition has been observed at the Curie temperature. The electrical properties of the sample can be explained by considering grain and grain boundaries contributions. All the samples show the polydispersive non-Debye type relaxation. 
Entered by:
Venkata Dantham on 2020-08-02 
 
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