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Phase change and ferroelectric nature of microwave‐heated lead cobalt titanate nanoparticles prepared by sol‐gel method
Author(s) -
Suresh Kumar Nagasamudram,
Padma Suvarna Reniguntla,
Chandra Babu Naidu Kadiyala
Publication year - 2018
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13056
Subject(s) - materials science , ferroelectricity , tetragonal crystal system , cobalt , dielectric , nanoparticle , lead titanate , transmission electron microscopy , microwave , polarization (electrochemistry) , phase (matter) , titanate , sol gel , chemical engineering , analytical chemistry (journal) , nanotechnology , ceramic , composite material , optoelectronics , metallurgy , chromatography , chemistry , physics , organic chemistry , quantum mechanics , engineering
The lead cobalt titanate (PCT) nanoparticles with varying cobalt concentration from 0.2 to 0.8 were synthesized via sol‐gel technique. Furthermore, these samples were undergone microwave heat treatment at 1023 K for ¾ hours. The powder diffraction study established the structural transformation of PCT nanoparticles from tetragonal (T) to rhombohedral (R) phases at higher cobalt contents. The surface morphology was examined by transmission electron microscope. Moreover, the ferroelectric property was elucidated by means of polarization versus electric field loop with varying temperature. The results revealed that 0.2, 0.6, and 0.8 compositions established the real ferroelectric behavior, whereas 0.4 composition attributed the banana shape hysteresis loop revealing high lossy dielectric material.