Using the methods of radiospectroscopy (EPR, NMR) to study the nature of the defect structure of solid solutions based on lead zirconate titanate (PZT)

0432620 - FZÚ 2015 RIV US eng J - Článek v odborném periodiku
Bykov, I. P. - Zagorodniy, A.Y. - Yurchenko, L.P. - Korduban, A.M. - Nejezchleb, K. - Trachevsky, V.V. - Dimza, V. - Jastrabík, Lubomír - Dejneka, Alexandr
Using the methods of radiospectroscopy (EPR, NMR) to study the nature of the defect structure of solid solutions based on lead zirconate titanate (PZT).
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. Roč. 61, č. 8 (2014), 1379-1385. ISSN 0885-3010. E-ISSN 1525-8955
Grant CEP: GA TA ČR TA01010517; GA ČR GAP108/12/1941
Institucionální podpora: RVO:68378271
Klíčová slova: lead zirconate titanate (PZT) * EPR * NMR * XPS spectroscopy
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.512, rok: 2014

The nature of intrinsic and impurity point defects in lead zirconate titanate (PZT) ceramics has been explored.Using electron paramagnetic resonance (EPR), nuclear magnetic resonance (NMR), and X-ray photoelectron spectroscopy (XPS) methods, several impurity sites have been identified in the materials, including the Fe3+ – oxygen vacancy (V0) complex and Pb ions. Both of these centers are incorporated into the PZT lattice.NMR spectra 207Pb in PbTiO3, PbZrO3, and PZT with iron content from 0 to 0.4 wt% showed that increasing the iron concentration leads to a distortion of the crystal structure and to improvement of the electrophysical parameters of the piezoceramics.This is due to the formation of a phase which has a higher symmetry, but at high concentrations of iron (>0.4 wt%), it leads to sharp degradation of electrophysical parameters.
Trvalý link: http://hdl.handle.net/11104/0237001