| Autor: |
Yingzhi Meng, Silin Tang, Zhaojie Wang, Xiang Niu, Hongfang Zhang, Dingyuan Wang, Yisong Bai, Biaolin Peng, Sheng-Guo Lu, Qingqing Ke, Laijun Liu |
| Jazyk: |
angličtina |
| Rok vydání: |
2025 |
| Předmět: |
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| Zdroj: |
Journal of Materiomics, Vol 11, Iss 3, Pp 100903- (2025) |
| Druh dokumentu: |
article |
| ISSN: |
2352-8478 |
| DOI: |
10.1016/j.jmat.2024.05.011 |
| Popis: |
The electrocaloric effect (ECE) offers a pathway to environmentally sustainable and easily miniaturized refrigeration technology, positioning it as a front-runner for the next generation of solid-state cooling solutions. This research unveils a remarkable ECE in a finely tuned (Ba0.86Ca0.14)0.98La0.02Ti0.92Sn0.08O3 ceramic, exhibiting a temperature shift (ΔT) of 1.6 K across more than 85% of the maximum ΔT (ΔTmax) and spanning an exceptionally wide operational range of 92 K. Our investigation on dielectric responses and ferroelectric polarization-electric field (P–E) loops suggests that the broad operational scope results from the fragmentation of extended ferroelectric domains into smaller domains and polar nano-regions (PNRs) supported by PFM analysis. Furthermore, the introduction of La enhances spontaneous polarization by significantly extending the maximum electric field that can be applied, facilitating high-performance ECE at ambient temperature. This study positions BaTiO3-based lead-free ceramic as a sustainable alternative for addressing the cooling demands of modern electronic components, marking a significant stride toward next-generation solid-state refrigeration. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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