Abstract
Lead-free 0.98(K0.48Na0.52)0.95Li0.05Nb1−xSbxO3–0.02Ba0.5(Bi0.5Na0.5)0.5ZrO3 (KNLNSx–BBNZ)
solid solution with 0.04 < x < 0.08 was prepared by traditional solid-state process. Samples
were sintered using a conventional method at 1120 ◦C for 4h. The effect of Sb5+ content on
the phase structure, microstructure, ferroelectric, dielectric and piezoelectric properties of
the KNLNSx–BBNZ ceramics was studied. The phase transition of the ceramic was determined by the temperature dependence of the dielectric properties, while the structural
properties, like the phase coexistence, were studied by X-ray diffraction. It was found that
ceramics in the composition range of 0.06 < x < 0.08 possess an orthorhombic (Amm2) and
tetragonal (P4mm) phases coexistence. The best piezoelectric properties were obtained in
the ceramics with x = 0.07: d33 = 282 pC/N, −d31 = 103 pC/N, kp = 46%, εr = 1820, tanı = 3% and
Tc = 271 ◦C. Furthermore, this composition exhibited a good thermal stability, up to 200 ◦C on
d33 piezoelectric constant, indicating that this material have great potential for application
from room temperature until this temperature limit.
solid solution with 0.04 < x < 0.08 was prepared by traditional solid-state process. Samples
were sintered using a conventional method at 1120 ◦C for 4h. The effect of Sb5+ content on
the phase structure, microstructure, ferroelectric, dielectric and piezoelectric properties of
the KNLNSx–BBNZ ceramics was studied. The phase transition of the ceramic was determined by the temperature dependence of the dielectric properties, while the structural
properties, like the phase coexistence, were studied by X-ray diffraction. It was found that
ceramics in the composition range of 0.06 < x < 0.08 possess an orthorhombic (Amm2) and
tetragonal (P4mm) phases coexistence. The best piezoelectric properties were obtained in
the ceramics with x = 0.07: d33 = 282 pC/N, −d31 = 103 pC/N, kp = 46%, εr = 1820, tanı = 3% and
Tc = 271 ◦C. Furthermore, this composition exhibited a good thermal stability, up to 200 ◦C on
d33 piezoelectric constant, indicating that this material have great potential for application
from room temperature until this temperature limit.
| Original language | English |
|---|---|
| Pages (from-to) | 266-272 |
| Number of pages | 7 |
| Journal | Boletín de la Sociedad Española de Cerámica y Vidrio |
| Volume | 60 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Jul-2021 |