| Autor: |
Feltz, Adalbert, Schmidt-Winkel, Patrick, Schossmann, Michael, Booth, Corwin H., Albering, Jörg H. |
| Předmět: |
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| Zdroj: |
Journal of the American Ceramic Society; Dec2007, Vol. 90 Issue 12, p3959-3967, 9p, 1 Diagram, 4 Charts, 6 Graphs |
| Abstrakt: |
New high-performance ferroelectric solid solutions based on Pb(Zr1− xTi x)O3 (PZT), which are doped with cryolite-type strontium niobate (SNO, Sr4(Sr2−2y/3Nb2+2 y/3)O11+ y VO ;1− y with 0≤ y≤1) and hence denoted PZT:SNO, and their microscopic structure and defect chemistry are described. Extended X-ray absorption fine-structure (EXAFS) analyses of PZT:SNO samples revealed that ∼10% of Sr2+ occupy the nominal B-sites of the perovskite-type PZT host lattice. This result is supported by EXAFS analyses of both a canonical SrTiO3 perovskite and two SNO model and reference compounds. Fit models that do not account for Sr2+ on B-sites are ruled out. A clear Sr–Pb peak in Fourier-transformed EXAFS data visually confirms this structural model. The generation of temporary oxygen vacancies and the intricate defect chemistry induced by SNO-doping of PZT are crucial for the exceptional material properties of PZT:SNO. As a result, ferroelectric PZT:SNO solid solutions are very attractive for use in new and innovative piezoelectric actuator and transducer applications. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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