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Dielectric and Piezoelectric Characteristics in Lead-Free Li$_{x}$(K$_{0.5}$Na$_{0.5}$)$_{1-x}$(Nb$_{0.8}$Ta$_{0.2}$)O$_{3}$ Piezoelectric Ceramics Prepared by Two-Step Calcination Method
| Content Provider | Scilit |
|---|---|
| Author | Chen, Kai-Huang Cheng, Chien-Min Tsai, Jen-Hwan Liao, Chin-Hsiung Liang, Shu-Hua |
| Copyright Year | 2012 |
| Description | Journal: Japanese Journal of Applied Physics Lead-free $Li_{x}(K_{0.5}Na_{0.5})_{1-x}(Nb_{0.8}Ta_{0.2})O_{3}$ piezoelectric ceramics samples prepared by the conventional solid-state reaction and two-step calcination method were achieved and compared. The effects of the amount of $Li_{2}O_{3}$ on the phase structure, microstructure, dielectric, and piezoelectric properties of $Li_{x}(K_{0.5}Na_{0.5})_{1-x}(Nb_{0.8}Ta_{0.2})O_{3}$ ceramics samples were systematically discussed and investigated. It was found that the $Li_{2}O_{3}$ content in $Li_{x}(K_{0.5}Na_{0.5})_{1-x}(Nb_{0.8}Ta_{0.2})O_{3}$ ceramics samples strongly affects the structure and electrical properties. For the two-step calcination method, the lead-free ceramics samples exhibited excellent dielectric and piezoelectric properties. The relative dielectric constant $(ε_{r}$) and loss tangent (tan δ) of the lead-free $Li_{x}(K_{0.5}Na_{0.5})_{1-x}(Nb_{0.8}Ta_{0.2})O_{3}$ piezoelectric ceramics samples for x = 0.03 compositions prepared by the two-step calcination method were 1223 and 0.021, respectively. In addition, the electromechanical coupling factor $(k_{p}$) and Curie temperature $(T_{C}$) were 48.5% and 315 °C, respectively. These results show that $Li_{x}(K_{0.5}Na_{0.5})_{1-x}(Nb_{0.8}Ta_{0.2})O_{3}$ ceramics samples are promising candidates for lead-free piezoelectric materials. |
| Related Links | http://iopscience.iop.org/article/10.1143/JJAP.51.09MD11/pdf |
| ISSN | 00214922 |
| e-ISSN | 13474065 |
| DOI | 10.1143/jjap.51.09md11 |
| 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 |
