Speaker
Dr
Methee Promsawat
(Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200; Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200)
Description
This work studies effects of metal oxides (MO; M = Zn${}^{2+}$, Cu${}^{+}$ and Ni${}^{2+}$) modifications on phase, microstructure, dielectric, ferroelectric and electrostrictive properties of Pb(Mg${}_{1/3}$Nb${}_{2/3}$)${}_{0.9}$Ti${}_{0.1}$O$_3$ (PMNT) ceramics. Different contents of MO (2 and 4 mol%) were modified into PMNT ceramics. The ceramics with the density about 7.80 g/cm${}^3$ were prepared. XRD pattern and lattice parameters of the PMNT ceramic did not change with the MO modifications. An average grain size of the PMNT ceramic increased with the ZnO and NiO modifications. The grain size was extremely enlarged with the CuO modification. A maximum dielectric constant of the PMNT ceramic was enhanced with 2 mol% ZnO and 2 mol% CuO modifications while 2 mol% NiO modification resulted in a reduction of the maximum dielectric constant. A temperature of a maximum dielectric constant (Tmax) of the PMNT ceramic shifted toward a higher temperature with 2 mol% ZnO modification. It was decreased with 2 mol% CuO and 2 mol% NiO modifications. Polarization-electric field curve of the PMNT ceramic was well developed with a higher remnant polarization (Pr) by 4 mol% ZnO modification while it was slimmer with a lower Pr by the NiO modification. A maximum strain and an electrostrictive coefficient of the PMNT ceramic were enhanced with 2 mol% ZnO and 2 mol% CuO modifications.
Author
Dr
Methee Promsawat
(Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200; Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200)
Co-authors
Dr
Anucha Watcharapasorn
(Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200; Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200)
Mrs
Napatporn Petnoi
(School of Electrical Engineering, Suranaree University of Technology, Nakhon Ratchasima, THAILAND 30000)
Dr
Sukanda Jiansirisomboon
(Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200; Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200)
