|
|
|
| Structral, up-conversion luminescence and electrical performances of Er3+-doped Bi3Ti1.5W0.5O9-Bi4Ti3O12 inter-growth lead-free piezoceramics |
|
|
|
|
Abstract Bi7-xErxTi4.5W0.5O21(BTW-BIT-xEr3+, x=0.05, 0.10, 0.15, 0.25, 0.35) lead-free piezoelectric?ceramics with inter-growth bismuth-layered structure were fabricated via solid?phase?synthesizing?method and the upconversion fluorescence and electrical properties were systemically investigated. The results of XRD and SEM revealed the formation of a single phase with bismuth-layered structure.Two green and one red emissions were observed for all components under the exciting wavelength of 980nm. The three emissions were centered at 532nm, 548nm and 660nm and the intensity ratio of red and green emissions could be tuned through the change of Er3+ doping content. According to the intensity ratio of 532nm and 548nm for BTW-BIT-0.15Er3+ in the range of 290K-440K, the temperature sensitivity was fitted and showed maximum temperature sensitivity of 0.0023K-1at 440K. The dielectric and impedance of BTW-BIT-xEr3+ ceramics were analyzed. The results indicated that Er3+ ions were in place of Bi3+ ion in perovskite-like blocks and lessened the oxygen vacancies. It accounted for the decrease of high-temperature dielectric?loss, the raising activation energy?and enhanced piezoelectric constant. It showed that BTW-BIT-0.15Er ceramic possessed the optimal properties: d33=14pC/N, Tc=697oC，tanδ=0.53%. In addition, BTW-BIT-0.15Er3+ exhibited the optimal photoluminescence and good thermal stability, indicating the potential application of this ceramic in high temperature sensors.
|
|
Received: 12 May 2021
|
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
