Nonlinearities in ferroelectric, piezoelectric, and dielectric behavior of Hf incorporated BaTiO3 nontoxic electroceramics
| Autor: | Rahul C. Kambale, Onkar A. Ramdasi, Y.D. Kolekar, V. R. Reddy, Pravin S. Kadhane |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Phase transition Materials science Analytical chemistry Dielectric Condensed Matter Physics 01 natural sciences Ferroelectricity Piezoelectricity Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Tetragonal crystal system visual_art 0103 physical sciences visual_art.visual_art_medium Curie temperature Ceramic Electrical and Electronic Engineering Electroceramics |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 31:18803-18815 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-020-04420-5 |
| Popis: | We report the structural, ferroelectric, piezoelectric, and dielectric properties of BaTi1−xHfxO3(x = 0, 0.04, 0.08) abbreviated as BT, BHT 1, and BHT-2 lead-free ceramics prepared by solid-state reaction. X-ray diffraction and Raman analysis confirm the formation of tetragonal lattice symmetry with a P4mm space group for studied compositions at room temperature. The tetragonality i.e. c/a ratio and average grain size found to be decreased with Hf4+ incorporation into BaTiO3 (BT). The nonlinearities in dielectric, ferroelectric and piezoelectric properties were observed with Hf4+ incorporation into BT, with the diffuse phase transition (DPT) for BaTi0.96Hf0.04O3 (BHT-1) ceramic, showing improved bulk density ~ 5.90 g/cm3, lattice strain ~ 0.168%, Pr ~ 9.03 μC/cm2, Ec ~ 3.44 kV/cm, Pmax ~ 17.42 μC/cm2, em ~ 7391, Jmax ~ 4.52 × 10–3 A/cm2, d33 ~ 212 pC/N, diffuseness parameter γ ~ 1.58, with relatively higher Curie temperature (TC ~ 125 °C) than pure BaTiO3 a promising candidate for lead-free ferroelectric memory storage (Fe-RAM) and piezoelectric transducers application. |
| Databáze: | OpenAIRE |
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