Effects of cadmium dopants on the piezoelectric and dielectric properties of Sm-modified PbTiO3 ceramics have been investigated. Sm-modified lead PbTiO3 ceramics with a composition of (Pb0.85-xCdxSm0.1)(Ti0.98Mn0.02 ) O3, x = 0.01-0.08 were prepared by conventional mixed-oxide methods with sintering temperature at 1150°C. We successfully showed that Cd additive is helpful to grow the grain size and obtain much higher thickness electromechanical coupling coefficient, kt (>0.55), than that of conventional PbTiO3-based ceramics and still keep small planar electromechanical coupling coefficient, kp. All of these doped ceramics have a positive temperature coefficient of frequency (TCF) smaller than 10 ppm/°C. Microstructural and compositional analyses of these doped ceramics have been carried out using X-ray diffraction (XRD) and scanning electron microscopy (SEM).
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering