DocumentCode :
2278242
Title :
Unipolar and sesquipolar electrical fatigue in PZT
Author :
Rödel, Jürgen ; Balke, Nina ; Glaum, Julia ; Granzow, Torsten
Author_Institution :
Inst. of Mater. Sci., Darmstadt
fYear :
2007
fDate :
27-31 May 2007
Firstpage :
605
Lastpage :
607
Abstract :
Electrical fatigue is an issue of application for piezoinjectors for diesel engines, for piezomotors and for many other actuator systems. Further, electrical fatigue is a topic, where complex defect interactions occur and where basic scientific questions need to be solved. Key events are: migration of electronic charge carriers in the bulk or as injected through the electrodes, reorientation of defect dipoles, domain wall movement and the interaction of the three above. Selected loading scenarios also lead to microcracking with attendant changes of local field distribution. The experiments presented were performed on discs of soft PZT under unipolar and sesquipolar loading. Measurements of the hysteresis of strain, polarization, dielectric coefficient and piezoelectric coefficient give insight into various interacting phenomena.
Keywords :
dielectric hysteresis; dielectric polarisation; diesel engines; electric domain walls; lead compounds; microcracks; piezoceramics; piezoelectric actuators; PZT; actuator systems; complex defect interactions; defect dipoles reorientation; dielectric coefficient; diesel engines; domain wall movement; electrical fatigue; electronic charge carriers migration; industrial applications; microcracking; piezoelectric coefficient; piezoinjectors; piezomotors; polarization; strain hysteresis; Actuators; Ceramics; Charge carriers; Diesel engines; Electrodes; Fatigue; Hysteresis; Materials science and technology; Polarization; Strain measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
ISSN :
1099-4734
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
Type :
conf
DOI :
10.1109/ISAF.2007.4393344
Filename :
4393344
Link To Document :
بازگشت