ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Bipolar electric fatigue in ferroelectric niobium-doped lead zirconate titanate stannateceramics was investigated. Variations in the polarization and strain hysteresis loops as well asmicrostructural modifications of the material due to the electric cycling were analyzed. Comparedwith ferroelectric PZT ceramics cycled under similar conditions, the material exhibited a higherresistance to electric fatigue. Properties of the specimens showed significant decays above 106.5 cycles.Asymmetric suppression of strain hysteresis loop was monitored. At 108 cycles, the remanentpolarization, the right maximum strain and the left maximum strain decreased to 70%, 58% and 44%of their initial values, respectively. The color of the material was changed from pale yellow to darkgrey with cycling. The properties and color of the fatigued samples were recovered almost fully tothose of the virgin state after a heat treatment at 500oC for 1 h. The pinning of domain walls, probablyby oxygen vacancies, was concluded to be the predominant fatigue mechanism for the material
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.359.pdf
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