Sol-Gel Derived Li2O Doped BNT-BKT-BT Ceramics: Microstructure and Piezoelectric Properties

Tao Sun; Ye Jing Dai; Hong Qiang Wang

doi:10.4028/www.scientific.net/KEM.512-515.1355

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Sol-Gel Derived Li2O Doped BNT-BKT-BT Ceramics:...

Sol-Gel Derived Li₂O Doped BNT-BKT-BT Ceramics: Microstructure and Piezoelectric Properties

Abstract:

The introduction of lithium ion into BNT-BKT-BT ceramics with sol-gel method allows the development of high-performance lead-free piezoelectric ceramics. Nanoscale precursor powders were synthesized through calcination of amorphous gels, and densified ceramics with single perovskite structure were prepared at a relatively low sintering temperature 1110 °C. Crystal grain growth was fully developed with the Li+ addition through scanning electron microscope observation. Enhanced electrical properties, piezoelectric constant d33~184 pC/N and planar electromechanical coupling factor kp~0.30, were obtained for the ceramics.

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Key Engineering Materials (Volumes 512-515)

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1355-1358

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https://doi.org/10.4028/www.scientific.net/KEM.512-515.1355

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June 2012

Authors:

Tao Sun, Ye Jing Dai, Hong Qiang Wang

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BNT-BKT-BT, Lead-Free, Sol-Gel (SG)

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