F-center mechanism of long-term relaxation in lead zirconate-titanate-based piezoelectric ceramics. 1. After-heating relaxation
Results of experimental investigation of relaxation aging processes in Pb(Zr,Ti)O3-based solid solutions after termination of external actions are presented. Heating, DC electric field, uniaxial pressure and some of their combinations were taken as external actions. In the main part of the present p...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
World Scientific Publishing
2015-12-01
|
| Series: | Journal of Advanced Dielectrics |
| Subjects: | |
| Online Access: | http://www.worldscientific.com/doi/pdf/10.1142/S2010135X15500368 |
| _version_ | 1818521593550209024 |
|---|---|
| author | V. M. Ishchuk D. V. Kuzenko |
| author_facet | V. M. Ishchuk D. V. Kuzenko |
| author_sort | V. M. Ishchuk |
| collection | DOAJ |
| description | Results of experimental investigation of relaxation aging processes in Pb(Zr,Ti)O3-based solid solutions after termination of external actions are presented. Heating, DC electric field, uniaxial pressure and some of their combinations were taken as external actions. In the main part of the present paper, we use heating as external action. The said processes are long-time one and are described by the logarithmic function of time.
Reversible and nonreversible relaxation processes take place depending on the action intensity. The relaxation rate depends on the action intensity also, and the said dependence has nonlinear and nonmonotonic form if external action leads to domain disordering.
The oxygen vacancies-based model for description of the long-time relaxation processes is suggested. The model takes into account oxygen vacancies on the sample’s surface ends, their conversion into F+- and F0-centers under external effects (due to the liberation of the pyroelectric charge) and subsequent relaxation of these centers into the simple oxygen vacancies after the actions termination. The initial sample’s state is electroneutrality one. F-center formation leads to the violation of the original sample’s electroneutrality, and generates DC electric field into the sample. Relaxation of F-centers is accompanied by decreasing of electric field, induced by them, and dielectric constant relaxation as consequent effect. |
| first_indexed | 2024-12-11T01:53:21Z |
| format | Article |
| id | doaj.art-2e3674cf68224f5794b614673f8ac645 |
| institution | Directory Open Access Journal |
| issn | 2010-135X 2010-1368 |
| language | English |
| last_indexed | 2024-12-11T01:53:21Z |
| publishDate | 2015-12-01 |
| publisher | World Scientific Publishing |
| record_format | Article |
| series | Journal of Advanced Dielectrics |
| spelling | doaj.art-2e3674cf68224f5794b614673f8ac6452022-12-22T01:24:41ZengWorld Scientific PublishingJournal of Advanced Dielectrics2010-135X2010-13682015-12-01541550036-11550036-910.1142/S2010135X1550036810.1142/S2010135X15500368F-center mechanism of long-term relaxation in lead zirconate-titanate-based piezoelectric ceramics. 1. After-heating relaxationV. M. Ishchuk0D. V. Kuzenko1Science & Technology Center “Reaktivelektron” of the National Academy Science of Ukraine, Bakinskikh Komissarov Street, 83049 Donetsk, UkraineScience & Technology Center “Reaktivelektron” of the National Academy Science of Ukraine, Bakinskikh Komissarov Street, 83049 Donetsk, UkraineResults of experimental investigation of relaxation aging processes in Pb(Zr,Ti)O3-based solid solutions after termination of external actions are presented. Heating, DC electric field, uniaxial pressure and some of their combinations were taken as external actions. In the main part of the present paper, we use heating as external action. The said processes are long-time one and are described by the logarithmic function of time. Reversible and nonreversible relaxation processes take place depending on the action intensity. The relaxation rate depends on the action intensity also, and the said dependence has nonlinear and nonmonotonic form if external action leads to domain disordering. The oxygen vacancies-based model for description of the long-time relaxation processes is suggested. The model takes into account oxygen vacancies on the sample’s surface ends, their conversion into F+- and F0-centers under external effects (due to the liberation of the pyroelectric charge) and subsequent relaxation of these centers into the simple oxygen vacancies after the actions termination. The initial sample’s state is electroneutrality one. F-center formation leads to the violation of the original sample’s electroneutrality, and generates DC electric field into the sample. Relaxation of F-centers is accompanied by decreasing of electric field, induced by them, and dielectric constant relaxation as consequent effect.http://www.worldscientific.com/doi/pdf/10.1142/S2010135X15500368Piezoelectricafter-heating processlong-term relaxationdielectric constantF-center |
| spellingShingle | V. M. Ishchuk D. V. Kuzenko F-center mechanism of long-term relaxation in lead zirconate-titanate-based piezoelectric ceramics. 1. After-heating relaxation Journal of Advanced Dielectrics Piezoelectric after-heating process long-term relaxation dielectric constant F-center |
| title | F-center mechanism of long-term relaxation in lead zirconate-titanate-based piezoelectric ceramics. 1. After-heating relaxation |
| title_full | F-center mechanism of long-term relaxation in lead zirconate-titanate-based piezoelectric ceramics. 1. After-heating relaxation |
| title_fullStr | F-center mechanism of long-term relaxation in lead zirconate-titanate-based piezoelectric ceramics. 1. After-heating relaxation |
| title_full_unstemmed | F-center mechanism of long-term relaxation in lead zirconate-titanate-based piezoelectric ceramics. 1. After-heating relaxation |
| title_short | F-center mechanism of long-term relaxation in lead zirconate-titanate-based piezoelectric ceramics. 1. After-heating relaxation |
| title_sort | f center mechanism of long term relaxation in lead zirconate titanate based piezoelectric ceramics 1 after heating relaxation |
| topic | Piezoelectric after-heating process long-term relaxation dielectric constant F-center |
| url | http://www.worldscientific.com/doi/pdf/10.1142/S2010135X15500368 |
| work_keys_str_mv | AT vmishchuk fcentermechanismoflongtermrelaxationinleadzirconatetitanatebasedpiezoelectricceramics1afterheatingrelaxation AT dvkuzenko fcentermechanismoflongtermrelaxationinleadzirconatetitanatebasedpiezoelectricceramics1afterheatingrelaxation |