| Autor: |
Pin Yang, Mark A. Rodriguez, Roger Howard Moore, James A. Voigt, George R. Bums |
| Rok vydání: |
2008 |
| Předmět: |
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| Zdroj: |
Advances in Electronic Ceramic Materials: Ceramic Engineering and Science Proceedings |
| DOI: |
10.1002/9780470291252.ch20 |
| Popis: |
The impacts of small niobium additions to processing, microstructure, and electrical properties in the Zr-rich lead zirconate titanate ceramics (PZT 95/5) were investigated. The influence of niobium content on dielectricresponses and the characteristics of ferroelectric behaviors, as well as the relative phase stability and the hydrostatic pressure induced ferroelectric-to-antiferroelectric phase transformation are reported. Results indicate that increasing the niobium concentration in the solid solutions enhances densification, refines the microstructure, decreases dielectric constant and spontaneous polarization, and stabilizes the ferroelectric phase. The stabilization of ferroelectric phase with respect to the antiferroelectric phase near PZT 95/5 composition dramatically increases the pressure required for the ferroelectric-to-antiferroelectric phase transformation. These observations were correlated to the creation of A-site vacancies and a slight modification of the crystal structure. The importance of these composition-property relationships on device application will be presented. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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