Study on Structural, Ferroelectric, Piezoelectric and Dielectric Properties of Ba0.92Ca0.08TiO3-BaTi0.96Zr0.04O3 Lead-Free Electroceramics
| Autor: | Yesappa Kolekar, Shankar I. Patil, Bhavna C. Keswani |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Piezoelectric coefficient Materials science 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Piezoelectricity Ferroelectricity Tetragonal crystal system symbols.namesake 0103 physical sciences Ceramics and Composites symbols Orthorhombic crystal system Composite material Electroceramics 0210 nano-technology Raman spectroscopy |
| Zdroj: | Transactions of the Indian Ceramic Society. 78:108-110 |
| ISSN: | 2165-5456 0371-750X |
| Popis: | The structural, ferroelectric, piezoelectric and dielectric properties of lead-free 0.45Ba0.92Ca0.08TiO3-0.55BaTi0.96Zr0.04O3 (BCT8-BZT4) ceramics synthesized by conventional solid state reaction method have been reported. Structural analyses by X-ray diffraction (XRD) and Raman spectroscopic measurements indicate that the BCT8-BZT4 ceramics possesses both tetragonal (space group P4mm) and orthorhombic (space group Amm2) crystal structures at room temperature. Dense microstructure with 5-7 µm grain size has been observed from scanning electron micrographs. Ferroelectric nature of BCT8-BZT4 has been confirmed from the polarization-electric field (P-E) hysteresis loop measurements. For BCT8-BZT4, the values of maximum polarization (Pmax=17.24 µC/cm2), remnant polarization (Pr=6.36 µC/cm2), coercive electric field (Ec=3.66 kV/cm) and direct piezoelectric coefficient (d33∼220 pC/N) have been observed to be comparable with those of lead based piezoelectric ceramics. The BCT8-BZT4 ceramics shows usual d... |
| Databáze: | OpenAIRE |
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