Abstract
The addition of a small amount of CuO to the 0.95(Na0.5K0.5)NbO3-0.05CaTiO3 (0.95NKN-0.05CT) ceramics sintered at 960 °C for 10 h produced a dense microstructure with large grains due to the liquid phase sintering. Due to the negligible Na2O evaporation, poling was easy for all specimens sintered at 960 °C. The piezoelectric properties of the specimens were considerably influenced by the relative density, grain size and liquid phase amount. The high piezoelectric properties of d33 = 200 pC/N, kp = 0.37, ε{lunate}3T / ε{lunate}0 = 1173 and Qm = 350 were obtained for the 0.95NKN-0.05CT ceramics containing 2.0 mol% CuO sintered at 960 °C for 10 h. Therefore, the 0.95NKN-0.05CT ceramics containing a small amount of CuO are a good candidate material for lead-free piezoelectric ceramics.
Original language | English |
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Pages (from-to) | 3580-3586 |
Number of pages | 7 |
Journal | Materials Research Bulletin |
Volume | 43 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2008 Dec 1 |
Keywords
- A. Ceramics
- C. Electron microscopy
- C. X-ray diffraction
- D. Microstructure
- D. Piezoelectricity
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering