Title :
Study of Thermodynamic, Microstructure and Ferroelectric Properties of Ca Doped PZT Nano Powder
Author :
Kour, P. ; Sinha, S.K. ; Barhai, P.K.
Author_Institution :
Dept. of Appl. Phys., Birla Inst. of Technol., Patna, India
Abstract :
In the present study 5% Ca doped PZT ceramics were prepared. DTA/TG of the green gel shows that the weight loss after 600°C was negligible and so this temperature was taken as calcinations temperature of the PCZT powder. X ray diffraction (XRD) analysis of calcined powders shows crystalline phase without pyrochlore phase. The average crystallite size of the powder, calculated by Debye Scherrer formula, has been found to be 23nm. Sintering was carried out at 1200°C for 8 hours in lead rich atmosphere. SEM analysis of sintered samples demonstrated that grain size was about 307.786 nm with clean grain boundaries and no large size porosity was observed. From the P-V loop measurement of the PCZT pellet we find the remnant polarization, the maximum polarization and the coercive field to be 0.0375μC/cm2, 0.318μC/cm2 and 383V respectively.
Keywords :
X-ray diffraction; calcination; calcium; dielectric hysteresis; dielectric polarisation; differential thermal analysis; ferroelectric ceramics; ferroelectric coercive field; grain boundaries; grain size; lead compounds; nanofabrication; nanoparticles; scanning electron microscopy; sintering; thermodynamic properties; DTA-TG; Debye Scherrer formula; P-V loop measurement; PCZT pellet; PZT ceramics; PZT:Ca; SEM analysis; X-ray diffraction; XRD analysis; calcined powders; coercive field; crystalline phase; crystallite size; ferroelectric properties; grain boundaries; grain size; green gel; lead rich atmosphere; microstructure; nanopowder; remnant polarization; sintering; temperature 1200 degC; temperature 600 degC; thermodynamic properties; time 8 hour; Calcium; Ceramics; Grain size; Lead; Powders; X-ray scattering;
Conference_Titel :
Nanoscience, Technology and Societal Implications (NSTSI), 2011 International Conference on
Conference_Location :
Bhubaneswar
Print_ISBN :
978-1-4577-2035-2
DOI :
10.1109/NSTSI.2011.6111780
