Origin of large electrostrain in Sn4+ doped Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 ceramics
| Autor: | Ruihao Yuan, Dezhen Xue, Turab Lookman, Wenwu Cao, Zhen Liu |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Polymers and Plastics Strain (chemistry) Condensed matter physics Anisotropy energy Field (physics) Doping Metals and Alloys 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Electronic Optical and Magnetic Materials visual_art Phase (matter) 0103 physical sciences Ceramics and Composites visual_art.visual_art_medium Ceramic 0210 nano-technology Softening Elastic modulus |
| Zdroj: | Acta Materialia. 157:155-164 |
| ISSN: | 1359-6454 |
| Popis: | A relatively large bipolar strain of 0.23 % was recently reported in 3 % Sn4+ doped (BaTi0.8Zr0.2)O3-x (Ba0.7Ca0.3)TiO3 (BZT-xBCT) ceramics under a field of 20 kV/cm. This strain is 53 % higher than that in BZT-50BCT (0.15 % at 20 kV/cm). To systematically study the mechanism and origin of the large electrostrain enhancement in Sn4+ doped BZT-53.3BCT, we develop a parameterized Landau free energy model and perform phase field simulations. Our results indicate that the softening of the elastic modulus C ′ = C 11 − C 12 accompanied by the reduction of anisotropy energy due to the 3 % Sn4+ doping is primarily responsible for the large electrostrain enhancement. |
| Databáze: | OpenAIRE |
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