Dielectric and piezoelectric properties of 0.02Pb(Y 2/3W 1/3)O 3· 0.98Pb(Zr 0.52Ti 0.48)O 3 ceramics doped with additives (Nb 2O 5, La 2O 3, MnO 2, and Fe 2O 3) were investigated. The grain sizes of these ceramics decreased with increasing amounts of additives. For additions of MnO 2 and Fe 2O 3, dielectric losses decreased, while for Nb 2O 5 and La 2O 3, these values increased. The maximum values of the mechanical quality factor Q m were found to be 956 and 975 for additions of 0.9 wt% Fe 2O 3 and 0.7 wt% MnO 2, respectively, but donor dopants (Nb 2O 5 and La 2O 3) did not change the values of Q m. On the other hand, the piezoelectric constant d 33 and the electromechanical coupling factor k p decreased with additions of MnO 2 and Fe 2O 3, but improved with additions of Nb 2O 5 and La 2O 3.
|Original language||English (US)|
|Number of pages||5|
|Journal||Journal of the American Ceramic Society|
|State||Published - Apr 1 1997|
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry