CaTiO3-modified [(K0.5Na0.5)0.94Li0.06](Nb0.94Sb0.06)O3 lead-free piezoelectric ceramics with improved temperature stability

• DOI: 10.1016/j.scriptamat.2008.06.011
• Publication Date: 2008-06-21T08:32:18Z
• Authors: Jiagang Wu; Dingquan Xiao; Yuanyu Wang; Wenjuan Wu; Bin Zhang; Jing Li; Jianguo Zhu
• Keywords: Lead (geology)

To improve the temperature stability of (K 0.5 Na 0.5 )NbO 3 -based ceramics, CaTiO 3 -modified [(K 0.5 Na 0.5 ) 0.94 Li 0.06 ](Nb 0.941 Sb 0. 06 )O 3 lead-free ceramics were prepared. The effects of the CaTiO 3 on the electrical properties and temperature stability of the ceramics were studied. It was found that these CaTiO 3 -modified ceramics possess good electrical properties ( d 33 = 252 pC/N and k p = 49%) and improved temperature stability for the polymorphic phase transition below room temperature. These results indicate that these materials are promising candidates for lead-free piezoelectric ceramics for practical applications.