F-center mechanism of long-term relaxation in lead zirconate-titanate-based piezoelectric ceramics. 1. After-heating relaxationстатья
Исследовательская статья
Информация о цитировании статьи получена из
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Дата последнего поиска статьи во внешних источниках: 11 сентября 2024 г.
Авторы:
Ishchuk V.M. ,
Kuzenko D.V.
Журнал:
Journal of advanced dielectrics
Том:
5
Номер:
4
Год издания:
2015
Издательство:
World Scientific Publishing Co.
Местоположение издательства:
United States
Номер статьи:
1550036
DOI:
10.1142/S2010135X15500368
Аннотация:
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. © 2016 The Author(s).
Добавил в систему:
Кузенко Данил Владимирович