Abstract
The orthorhombic structure of (Na0.5K0.5)NbO 3 (NKN) ceramics was maintained when ZnO was added. NKN ceramics have a porous microstructure and dissolve when they are exposed to water. However, as ZnO was added, a dense microstructure was developed and deliquescence was not observed. The mechanical quality factor (Qm) and coercive field (Ec) increased with the addition of ZnO, indicating that ZnO acted as a hardener in the NKN ceramics. The dielectric constant (ε3T/εo), piezoelectric constant (d33) and electromechanical coupling factor (kp) increased when a small amount of ZnO was added, which might be due to the increase in density. The good dielectric and piezoelectric properties of ε3T/εo = 500, d33 = 121 and kp, = 0.4 were obtained for the NKN ceramics with 1.0mol% ZnO.
Original language | English |
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Pages (from-to) | L1072-L1074 |
Journal | Japanese Journal of Applied Physics, Part 2: Letters |
Volume | 43 |
Issue number | 8 B |
DOIs | |
Publication status | Published - 2004 Aug 15 |
Keywords
- (NaK)NbO
- Deliquescence
- Lead-free ceramics
- Piezoelectric properties
- ZnO
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)