Doping effects of strontium on the piezoelectric and dielectric properties of Ca additive Sm-modified PbTiO3 ceramics
| Autor: | Sheng-Yuan Chu, Te Yi Chen |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Electromechanical coupling coefficient
Materials science Dopant Doping Metals and Alloys Analytical chemistry Mineralogy Sintering Dielectric Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Lattice constant visual_art visual_art.visual_art_medium Ceramic Electrical and Electronic Engineering Instrumentation Temperature coefficient |
| Zdroj: | Sensors and Actuators A: Physical. 116:10-14 |
| ISSN: | 0924-4247 |
| DOI: | 10.1016/j.sna.2003.10.033 |
| Popis: | Effects of Sr dopants on the piezoelectric and dielectric properties of (Ca, Sm)-modified PbTiO3 ceramics have been investigated. The modified lead PbTiO3 ceramics with a composition of (Pb0.73−xCa0.15SrxSm0.08)(Ti0.98Mn0.02)O3; x=0.05–0.1 were prepared by conventional mixed-oxide methods with sintering temperature at 1200 °C. Microstructural and compositional analyses of these doped ceramics have been carried out using XRD and SEM. We successfully showed that Sr additive is helpful to reduce the lattice constant and obtain higher thickness electromechanical coupling coefficient, kt (>0.55), and still keep small planar electromechanical coupling coefficient, kp. In addition, Sr additives varied the temperature coefficient of resonant frequency (TCF) value from a positive value (+34 ppm/°C) to a negative value (−47.2 ppm/°C), and there exists a point with the TCF value close to zero between Sr=0.06–0.065. |
| Databáze: | OpenAIRE |
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