Micromechanics of domain switching in rhombohedral PZT ceramics
| Autor: | Philip J. Withers, Axel Steuwer, B. Cherdhirunkorn, David A. Hall, T. Mori |
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| Rok vydání: | 2008 |
| Předmět: |
Diffraction
Materials science Condensed matter physics Process Chemistry and Technology Poling Mineralogy Ferroelectricity Piezoelectricity Titanate Surfaces Coatings and Films Electronic Optical and Magnetic Materials Electric field X-ray crystallography Materials Chemistry Ceramics and Composites Saturation (magnetic) |
| Zdroj: | Ceramics International. 34:679-683 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2007.09.001 |
| Popis: | The lattice strain e{2 0 0} and diffraction peak intensity ratio R[1 1 1) have been determined in soft rhombohedral PZT ceramics during the application of an electric field up to 2.5 MV m -1 and as a function of the grain orientation ψ, using high energy synchtron X-ray diffraction. The magnitude of both e{10 0} and R {1 1 1} increased sharply beyond a field level of 1 MV m -1 due to the onset of ferroelectric domain switching. e{2 00} exhibited a near linear dependence on cos 2 ψ, in agreement with previous studies of the remanent-poled state. In contrast, the R{ 1 1 1}-cos 2 ψ plot showed evidence of saturation in ferroelectric domain switching, particularly for ψ > 60°. The development of lattice strain during poling is discussed in terms of contributions from the intrinsic piezoelectric effect and from residual stress caused by differences in the poling strain of a grain, and the piezoelectric strain of a grain relative to its surroundings. |
| Databáze: | OpenAIRE |
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