We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effect of sintering condition and Ca<sup>2+</sup>-substitution on structural and electrical properties of lead-free Ba<sub>0.46</sub>Sr<sub>0.54</sub>TiO<sub>3</sub> piezoceramics for uncooled IR detectors application.
- Authors
Kumar, Dhanranjan; Rout, S. K.; Mishra, Kamana K.
- Abstract
Barium titanate (BaTiO3) is a potential material for producing lead-free piezoceramics-based electronic devices. Microstructural engineering improves ceramic materials’ dielectric, ferroelectric, and piezoelectric characteristics. This research aims to investigate the impacts of the sintering process and Ca2+ substitution on microstructure and electromechanical performance of the Ba0.46Sr0.54TiO3 (BST) and Ba0.46Sr0.27Ca0.27TiO3 (BSCT) samples. The Ba0.46Sr0.54TiO3 and Ba0.46Sr0.27Ca0.27TiO3 powders were synthesized using a solid-state reaction technique. X-ray diffraction indicated the presence of tetragonal and cubic phases in a single-phase powder. The sintering condition influences grain size and density; as the sintering temperature rises, grain size reduces and density increases. We measured grain sizes in the range of 0.89 to 2.14 µm, and densities between 82% and 93.5% of the theoretical density, along with dielectric constants between ~ 250 and ~ 6000 at 5 kHz. A relation between grain sizes, dielectric constants, and polarization behaviors in response to temperature and electric field were all evaluated. The giant impact was observed in by the inclusion of Ca2+ in recoverable energy densities and efficiency from 1.21 J/cm3 (BST@1250 °C at 20 kV/cm) to 1.76 J/cm3 (BSCT@1250 °C at 20 kV/cm) and 21.48 to 51.50 %, respectively, in prepared piezoceramics.
- Publication
Journal of Materials Science: Materials in Electronics, 2024, Vol 35, Issue 17, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-024-12946-1