Cu2O Doping Effects on Microstructure and Piezoelectric Properties in (Na0.52K0.44)(Nb0.9Sb0.06)O3-0.04LiTaO3 Pb-Free Ceramics
| Periodical | Materials Science Forum (Volume 724) |
|---|---|
| Main Theme | Eco-Materials Processing and Design XIII |
| Edited by | Jing Sun, Lian Gao, Hyungsun Kim, Jian Feng Yang, Tohru Sekino and Soo Wohn Lee |
| Pages | 123-126 |
| DOI | 10.4028/www.scientific.net/MSF.724.123 |
| Citation | Soon Young Kweon et al., 2012, Materials Science Forum, 724, 123 |
| Online since | June, 2012 |
| Authors | Soon Young Kweon, Youn Ki Lee, Sung Lim Ryu |
| Keywords | Cu2O Additive, Lead-Free Ceramics, Phase Boundary, Piezoelectric Properties |
| Price | US$ 28,- |
The (Na0.52K0.44)(Nb0.9Sb0.06)O3-0.04LiTaO3 (NKNS-LT) ceramics doped with various Cu2O contents were prepared by the conventional solid state reaction method. The Cu2O content was varied in the range of 0.1~0.4 wt%. The effects of Cu on microstructure, crystallographic phase transition, and piezoelectric properties were investigated. The material with perovskite structure had a tetragonal phase (T1) when Cu2O concentration was less than 0.3 wt% and it was transformed to another tetragonal phase (T2) when the Cu2O amount was greater than 0.3 wt%. The phase boundary between T1 and T2 phases was appeared at around 0.3 wt% of Cu2O concentration. The piezoelectric properties were shown the maximum values at the composition of the phase boundary. The electro-mechanical coupling factor (kp) was 0.42 and the piezoelectric charge constant (d33) was 245 pC/N at the 0.3 wt% of Cu2O concentration.
