Development of perovskite in Pr substituted Pb(Zr<inf>0.52</inf>Ti<inf>0.48</inf>)O<inf>3</inf>and dielectric characteristic

• Main Authors: N. Udomkan, P. Limsuwan, P. Winotai, T. Tunkasiri
• Format: Journal
• Published: 2018
• Subjects: Physics and Astronomy
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33747840916&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/61936
• Institution: Chiang Mai University

The purpose of this research is to investigate the structure of lead zirconate titanate ceramics (Zr:Ti = 52:48) when doped with Pr2O3and the corresponding properties such as micro-structural properties, physical properties, dielectric constant (εr), piezo-electric properties (kp, Qm, and d33), and the ferroelectric property. The materials were prepared via conventional mixed oxide method and sintered at 1200°C. The Rietveld refinement of X-ray diffraction patterns and combination of both patterns revealed the tetragonal structure for all samples to have space group of P4mm. For higher dopant content (10 mol%), the pyrochlore phase of Pr2O3also appeared in the respective samples. These pyrochlore phases caused the detriment of dielectric and piezoelectric properties. For those with lower dopant content (1.00 mol%), the Pr ion substituted at the A and B sites with isovalent dopant effects, i.e. a lower value of εr, and kp. The hysteresis loops indicated the ferroelectric property for all samples. The microstructure showed dense grain according to a high density and the additional phases of Pr2O3were clearly observed for 10 mol% doping. The Curie temperature decreased with increasing dopant content, as determined from high temperature X-ray diffraction and differential scanning calorimetry. © World Scientific Publishing Company.