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Piezoelectric Properties of Li-Doped (K$_{0.48}$Na$_{0.52}$)NbO$_{3}$ Ceramics Synthesized Using Hydrothermally-Derived KNbO$_{3}$ and NaNbO$_{3}$ Fine Powders
| Content Provider | Scilit |
|---|---|
| Author | Maeda, Takafumi Hemsel, Tobias Morita, Takeshi |
| Copyright Year | 2012 |
| Description | Journal: Japanese Journal of Applied Physics $[Li_{x}(Na_{0.52}K_{0.48})_{1-x}]NbO_{3}$ (0 ≤x ≤0.091) ceramics were synthesized using hydrothermal powders and the lithium doping content was controlled to optimize their piezoelectric properties. The raw $KNbO_{3}$ and $NaNbO_{3}$ powders were obtained separately by a hydrothermal method and $LiNbO_{3}$ powders were prepared by milling a commercial $LiNbO_{3}$ single crystal. These powders were mixed with ethanol at a molar ratio $LiNbO_{3}$: $(Na_{0.52}K_{0.48})NbO_{3}$= x : 1-x. The synthesized powders were sintered at 1060–1120 °C for 2 h. We succeeded in obtaining highly dense $[Li_{x}(Na_{0.52}K_{0.48})_{1-x}]NbO_{3}$ ceramics using hydrothermal powder. The X-ray diffraction patterns revealed that the crystal phase changed from orthorhombic to tetragonal at around x = 0.06. At this morphotropic phase boundary (MPB), the c/a ratio changed from 1.016 to 1.024 and the highest piezoelectric constant was obtained with the chemical component of $[Li_{0.065}(K_{0.48}Na_{0.52})_{0.935}]NbO_{3}$. The obtained piezoelectric properties were as follows: $k_{33}$ = 0.51, ε_{33}^{T}$/ε_{0}$ = 836, c_{33}$^{E}$ = 46 GPa, $d_{33}$ = 203 pC/N, and $T_{c}$ = 482 °C. |
| Related Links | http://iopscience.iop.org/article/10.1143/JJAP.51.09MD08/pdf |
| ISSN | 00214922 |
| e-ISSN | 13474065 |
| DOI | 10.1143/jjap.51.09md08 |
| Journal | Japanese Journal of Applied Physics |
| Issue Number | 9S2 |
| Volume Number | 51 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2012-09-20 |
| Access Restriction | Open |
| Subject Keyword | Journal: Japanese Journal of Applied Physics Business and Management |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy Engineering |
