In:
Science Advances, American Association for the Advancement of Science (AAAS), Vol. 6, No. 13 ( 2020-03-27)
Abstract:
Electromechanical coupling in piezoelectric materials allows direct conversion of electrical energy into mechanical energy and vice versa. Here, we demonstrate lead-free (K x Na 1− x )NbO 3 single crystals with an ultrahigh large-signal piezoelectric coefficient d 33 * of 9000 pm V −1 , which is superior to the highest value reported in state-of-the-art lead-based single crystals (~2500 pm V −1 ). The enhanced electromechanical properties in our crystals are realized by an engineered compositional gradient in the as-grown crystal, allowing notable reversible non-180° domain wall motion. Moreover, our crystals exhibit temperature-insensitive strain performance within the temperature range of 25°C to 125°C. The enhanced temperature stability of the response also allows the materials to be used in a wider range of applications that exceed the temperature limits of current lead-based piezoelectric crystals.
Type of Medium:
Online Resource
ISSN:
2375-2548
DOI:
10.1126/sciadv.aay5979
Language:
English
Publisher:
American Association for the Advancement of Science (AAAS)
Publication Date:
2020
detail.hit.zdb_id:
2810933-8
