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ACS Appl Mater Interfaces. 2014 May 14;6(9):6177-80. doi: 10.1021/am500819v. Epub 2014 May 1.

New potassium-sodium niobate ceramics with a giant d33.

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1
Department of Materials Science, Sichuan University , Chengdu 610064, P. R. China.

Abstract

For potassium-sodium niobate, poor piezoelectric properties always perplex most researchers, and then it becomes important to attain a giant piezoelectricity. Here we reported a giant piezoelectric constant in (1-x)(K0.48Na0.52)(Nb0.95Sb0.05)O3-xBi0.5Ag0.5ZrO3 lead-free ceramics. The rhombohedral-tetragonal phase boundary was shown in the ceramics with 0.04<x≤0.05, and then the ceramic with x=0.0425 possesses a giant d33 of ∼490 pC/N. We also discussed the physical mechanisms of enhanced piezoelectricity. As a result, such a research can benefit the sustainable development of (K,Na)NbO3 materials.

PMID:
24784228
DOI:
10.1021/am500819v
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