Tunable Pyroelectricity around the Ferroelectric/Antiferroelectric Transition
| Autor: | Florian Weyland, Xiaoli Tan, Satyanarayan Patel, Nikola Novak |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Phase transition Materials science Condensed matter physics 02 engineering and technology Dielectric Atmospheric temperature range 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity Pyroelectricity General Energy Electric field 0103 physical sciences Figure of merit Antiferroelectricity 0210 nano-technology |
| Zdroj: | Energy Technology. 6:865-871 |
| ISSN: | 2194-4288 |
| DOI: | 10.1002/ente.201700411 |
| Popis: | The pyroelectric performance of Pb0.99Nb0.02[(Zr0.57Sn0.43)0.92Ti0.08]0.98O3 ceramics was quantified by dielectric, polarization, and specific heat capacity measurements. The tunability of pyroelectric properties upon electric field application was studied as a function of temperature. The large pyroelectric coefficient of 0.28 Cm^-2K^-1 was associated with the ferroelectric (FE)–antiferroelectric (AFE) phase transition. The pyroelectric coefficient can be tuned over a broad temperature range of almost 40 K above the zero electric field phase transition. Electrical and thermal measurements were used to estimate various pyroelectric figures of merit. Pyroelectric figures of merit are almost three order of magnitude higher than those previously reported in FE materials. The large pyroelectric properties indicate that the investigated material is a promising candidate for many pyroelectric applications. |
| Databáze: | OpenAIRE |
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