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- Title
Dielectric and ferroelectric properties of AgSbO-modified (Li,K,Na)(Nb,Ta)O lead-free piezoceramics.
- Authors
Liu, Qing; Zhu, Fang-Yuan; Zhang, Bo-Ping; Li, Longtu; Li, Jing-Feng
- Abstract
(1 − x)Li(KNa)(NbTa)O- xAgSbO (abbreviated as LKNNT- xAS, 0.045 < x < 0.055) lead-free ceramics with a high relative density (~95 %) were successfully fabricated by the conventional method. Only a small AgSbO composition interval of 0.25 mol% was implemented for the purpose of property enhancement via the precise phase control. Room temperature XRD patterns confirmed that two phase coexistent structure of orthorhombic and tetragonal phases was obtained and the volume fraction of orthorhombic phase decreased as AgSbO increased from 0.045 to 0.055. A relatively high d value up to 289 pC/N was achieved in the LKNNT-0.0525AS ceramics. Meanwhile the planar electromechanical coupling factor k, the remnant polarization P and the relative dielectric constant ε reached 0.42, 16.3 μC/cm, 1967, respectively. Considering the electrical properties, AgSbO modified (Li,K,Na)(Nb,Ta)O ceramics may be a potential candidate of lead-free piezoelectric ceramics.
- Subjects
SILVER compounds; LEAD-free ceramics; SPECIFIC gravity; PIEZOELECTRIC ceramics; PERMITTIVITY
- Publication
Journal of Materials Science: Materials in Electronics, 2015, Vol 26, Issue 12, p9309
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-015-3022-3