Effect of oxide dopants on the structure and electrical properties of (Na0.5K0.5)NbO3-LiSbO3 lead-free piezoelectric ceramics
Effect of oxide dopants on the structure and electrical properties of (Na0.5K0.5)NbO3-LiSbO3 lead-free piezoelectric ceramics
复制标题
DOI：
10.1016/j.physb.2010.01.074
复制
发表时间：
2010-04
影响因子：
2.8
通讯作者：
Wufeng Yang;D. Jin;Tingting Wang;Jinrong Cheng
中科院分区：
文献类型：
--
作者：
Wufeng Yang;D. Jin;Tingting Wang;Jinrong Cheng
The alkaline niobate-based perovskite ceramics (K,Na,Li)(Nb,Sb)O{sub 3} has been regarded as a new candidate of lead-free piezoelectric materials due to its excellent piezoelectric properties. In this study, 0.948(Na{sub 0.5}K{sub 0.5})NbO{sub 3}-0.052LiSbO{sub 3} (KNN-LS) based ceramics were prepared by a conventional solid-state reaction method. The effects of ZnO, CuO and MnO{sub 2} on the structure, dielectric and piezoelectric properties of KNN-LS were investigated in this study. When 1 mol% oxide dopants were added, respectively, KNN-LS piezoelectric ceramics became 'hard'. Mechanical quality factor Q value increased significantly with unobvious change of d{sub 33} (93-119 pC/N). KNN-LS ceramics kept high Curie temperature Tc around 350 deg. C. Dielectric loss at 1 KHz decreased a lot to below 5%. The results show that the oxide-doped KNN-LS ceramics are promising lead-free piezoelectric materials for electromechanical transducer applications.
