Details

Autor(en) / Beteiligte

• Kour, P
• Kumar, Pawan
• Sinha, S K
• Kar, Manoranjan

Titel

Study of dielectric and impedance spectroscopy of La substituted nanocrystalline Pb(Zr sub(0.52)Ti sub(0.48))O sub(3) ceramics

Ist Teil von

• Journal of materials science. Materials in electronics, 2015-03, Vol.26 (3), p.1304-1310

Erscheinungsjahr

2015

Quelle

SpringerLink Journals

Beschreibungen/Notizen

• Nanocrystalline Pb sub(1-x)La sub(x)Zr sub(0.52)Ti sub(0.48)O sub(3) ceramics with x = 0.00, 0.02, 0.04, 0.06 and 0.1 were prepared by the sol gel method. X-ray diffraction analysis of the calcined powder at room temperature shows mixed rhombohedral and tetragonal crystal structure. The grain size increases with the increase in lanthanum concentration. Dielectric properties of the samples were studied as a function of frequency and temperature. The Curie temperature decreases and dielectric constant increases with the increase in La super(3+) concentration. The frequency dependent ac conductivity follows Jonscher power law. The detailed study of relaxation process and microstructure effect has been carried out by impedance spectroscopy. The Nyquist plot shows two semicircles ascribed to the grain and grain boundary effect in La super(3+) substituted PZT ceramics. A non-Debye type relaxation was observed in all the samples.