Enhanced Dielectric and Ferroelectric Properties of Pb(Mg1/3Nb2/3)0.65Ti0.35O3 Ceramics by ZnO Modification |
| |
| Authors: | Methee Promsawat Anucha Watcharapasorn Zuo‐Guang Ye Sukanda Jiansirisomboon |
| |
| Affiliation: | 1. Faculty of Science, Department of Physics and Materials Science, Chiang Mai University, Chiang Mai, Thailand;2. Faculty of Science, Materials Science Research Center, Chiang Mai University, Chiang Mai, Thailand;3. Department of Chemistry and 4D LABS, Simon Fraser University, Burnaby, British Columbia, Canada |
| |
| Abstract: | Phase formation, microstructures, dielectric, and ferroelectric properties of ZnO‐modified Pb(Mg1/3Nb2/3)0.65Ti0.35O3 (PMNT/xZnO, where x = 0, 0.4, 2.0, 4.0, and 11.0 mol%) ceramics were studied. A coexistence of rhombohedral and tetragonal ferroelectric phases was observed at room temperature in all samples. The ceramics with the relative densities of 93%–95% were prepared. The modification by ZnO led to an increase in grain sizes of PMNT ceramics. The maximum dielectric constant of the pure PMNT ceramic was increased with x = 0.4–4.0 mol% ZnO doping, with the highest value being observed in the 2.0 mol% sample. Both the temperature at which the transition between rhombohedral and tetragonal ferroelectric phases took place (TR‐T) and the Curie temperature of the ceramics tended to increase with increasing x. The ferroelectric properties were enhanced with increased remanent polarization and P(E) loop squareness in the compositions with x = 0.4–4.0 mol%. However, the ferroelectric properties were attenuated with x = 11.0 mol%. |
| |
| Keywords: | |
|
|
