Effects of poling field on the piezoelectric and dielectric properties of Nb additive PZT-based ceramics and their applications on SAW devices
| Autor: | Te-Yi Chen, Sheng-Yuan Chu, I-Ta Tsai |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Electromechanical coupling coefficient
Materials science Mechanical Engineering Surface acoustic wave Poling Sintering Dielectric Condensed Matter Physics Lead zirconate titanate Piezoelectricity chemistry.chemical_compound chemistry Mechanics of Materials visual_art visual_art.visual_art_medium General Materials Science Ceramic Composite material |
| Zdroj: | Materials Letters. 58:752-756 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2003.07.004 |
| Popis: | The piezoelectric lead zirconate titanate (PZT)-based ceramics with a composition of Pb1−0.5x(Zr0.52Ti0.48)1−xNbxO3; x=0.02–0.06 were prepared by conventional mixed-oxide method, using sintering temperature at 1250 °C and poling field at 0–50 kV/cm. Microstructural and compositional analyses of the PZT-based ceramics have been carried out using XRD and SEM. The dielectric constant measured at 1 kHz is about 1500 and the loss factor is small than 0.02. The maximum planar electromechanical coupling coefficient, kp, is 0.591 as x=0.055 and Ep=30 kV/cm. It showed that the Nb additives were helpful in improving both of the dielectric and piezoelectric properties. Surface acoustic wave (SAW) device, which the PZT-ceramic was used for substrate, was fabricated. |
| Databáze: | OpenAIRE |
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