Wang Xiaopeng, Wu Jiagang, Xiao Dingquan, Cheng Xiaojing, Zheng Ting, Lou Xiaojie, Zhang Binyu, Zhu Jianguo
Department of Materials Science, Sichuan University , Chengdu 610064, P. R. China.
ACS Appl Mater Interfaces. 2014 May 14;6(9):6177-80. doi: 10.1021/am500819v. Epub 2014 May 1.
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.
对于铌酸钾钠，其压电性能不佳一直困扰着大多数研究人员，因此实现巨大的压电性变得至关重要。在此，我们报道了(1-x)(K0.48Na0.52)(Nb0.95Sb0.05)O3-xBi0.5Ag0.5ZrO3无铅陶瓷中的巨大压电常数。在0.04<x≤0.05的陶瓷中呈现出菱方-四方相界，x=0.0425的陶瓷具有约490 pC/N的巨大d33。我们还讨论了压电性增强的物理机制。结果表明，这样的研究有利于(K,Na)NbO3材料的可持续发展。
