Multiscale reconfiguration induced highly saturated poling in lead-free piezoceramics for giant energy conversion.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38519493.
- Also identified by DOI 10.1038/s41467-024-46894-5 and PMC identifier 10959963.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The development of high-performance lead-free K<sub>0.5</sub>Na<sub>0.5</sub>NbO<sub>3</sub>-based piezoceramics for replacing commercial lead-containing counterparts is crucial for achieving environmentally sustainable society. Although the proposed new phase boundaries (NPB) can effectively improve the piezoelectricity of KNN-based ceramics, the difficulty of achieving saturated poling and the underlying multiscale structures resolution of their complex microstructures are urgent issues. Here, we employ a medium entropy strategy to design NPB and utilize texture engineering to induce crystal orientation. The developed K<sub>0.5</sub>Na<sub>0.5</sub>NbO<sub>3</sub>-based ceramics enjoys both prominent piezoelectric performance and satisfactory Curie temperature, thus exhibiting an ultrahigh energy harvesting performance as well as excellent transducer performance, which is highly competitive in both lead-free and lead-based piezoceramics. Comprehensive structural analysis have ascertained that the field-induced efficient multiscale polarization configurations irreversible transitions greatly encourages high saturated poling. This study demonstrates a strategy for designing high-performance piezoceramics and establishes a close correlation between the piezoelectricty and the underlying multiscale structures.