Piezoelectric softening by Nb substitution in (Ba,Pb)ZrO3ceramics
| Autor: | B. Fraygola, Ulises Salazar, Nicola Marzari, Alberto Biancoli, Nava Setter, David Bahati, Anand Chandrasekanar, Dragan Damjanovic |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Doping Analytical chemistry Mineralogy 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites Hardening (metallurgy) visual_art.visual_art_medium Relative density Ceramic Electroceramics 0210 nano-technology Softening |
| Zdroj: | Journal of the American Ceramic Society. 100:1885-1895 |
| ISSN: | 0002-7820 |
| DOI: | 10.1111/jace.14718 |
| Popis: | Donor doping is commonly applied for softening of the piezoelectric and dielectric properties and facilitation of polarization switching in the ubiquitous Pb(Zr,Ti)O3 [PZT] ceramics. The origin of the donor-dopant effects is not entirely clear. (Pb,Ba)ZrO3 [PBZ] is a related ferroelectric material, its perovskite A-site being partially occupied by the larger Ba+2 cation, less prone to evaporation than Pb+2, and the B-site is occupied entirely by the valency-stable Zr+4. Here we report on our studies of Nb+5 doping effects in (Pb,Ba)ZrO3. Similarly, to past observations on La+3 and Nb+5 doped PZT, we find a strong reduction in relative density of PBZ when the doping is 0.2% are consistent with Nb+5 entering the B-site and softening effects are observed. The study supports the scenario of hardening due to domain walls pinning by VPb-VO divacancies and softening upon decrease in their concentration. |
| Databáze: | OpenAIRE |
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