Composition-induced non-ergodic–ergodic transition and electrocaloric evolution in Pb(1−1.5x)La(x)Zr(0.8)Ti(0.2)O(3) relaxor ferroelectric ceramics
| Autor: | Junjie Li, Ruowei Yin, Xiaopo Su, Jianting Li, Shiqiang Qin, Qiumei Wei, Mankang Zhu, Dong Guo, Lijie Qiao, Yang Bai |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
differential scanning calorimetry
thermal stability relaxor ferroelectrics ferroelectric transitions pyroelectricity lead compounds ferroelectric ceramics lanthanum compounds crystal microstructure electrocaloric (ec) refrigeration modified differential scanning calorimeter relaxor behaviour electrocaloric evolution relaxor ferroelectric ceramics composition-induced nonergodic-ergodic transition polar nanoregions perovskite phase dense microstructure la substitution electric field nonergodic-ergodic state boundary temperature 0.0 degc to 140.0 degc pb(1-1.5x)la(x)zr(0.8)ti(0.2)o(3) Materials of engineering and construction. Mechanics of materials TA401-492 |
| Zdroj: | IET Nanodielectrics (2019) |
| Druh dokumentu: | article |
| ISSN: | 2514-3255 |
| DOI: | 10.1049/iet-nde.2019.0001 |
| Popis: | Relaxor ferroelectrics, with polar nanoregions (PNRs), are good candidates for electrocaloric (EC) refrigeration. This study investigates the EC performance of the Pb(1−1.5x)La(x)Zr(0.8)Ti(0.2)O(3) relaxor ferroelectric ceramics by the direct measurement using a modified differential scanning calorimeter. All the ceramics exhibit pure perovskite phase with a dense microstructure. The results indicate that the increasing La substitution strengthens the relaxor behaviour, promotes the transition from non-ergodic to ergodic state, and enhances the thermal stability of EC property (instability η |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|
Plný text