Enhanced dielectric and ferroelectric behavior in 0.94BNT-0.06BCTS lead free piezoelectric ceramics synthesized by the solid state combustion technique
| Autor: | Theerachai Bongkarn, Artid Laowanidwatana, Chittakorn Kornphom, J. Rittisak |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Sintering 02 engineering and technology Dielectric 01 natural sciences law.invention law Phase (matter) 0103 physical sciences Materials Chemistry Calcination Ceramic Electrical and Electronic Engineering Perovskite (structure) 010302 applied physics 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Grain size Electronic Optical and Magnetic Materials Chemical engineering Control and Systems Engineering visual_art Ceramics and Composites visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Integrated Ferroelectrics. 187:20-32 |
| ISSN: | 1607-8489 1058-4587 |
| DOI: | 10.1080/10584587.2018.1445372 |
| Popis: | In this study, the effects of calcination temperature (600–900°C for 2 h) and sintering temperature (1100–1200°C for 2 h) on phase formation, microstructure and electrical properties of new 0.94(Bi0.5Na0.5TiO3)-0.06(Ba0.945Ca0.055)(Ti0.91Sn0.09)O3 (0.94BNT-0.06BCTS) lead-free piezoelectric ceramics were investigated. These ceramics were fabricated by the solid state combustion technique using glycine as fuel. It was found that single perovskite phase of 0.94BNT-0.06BCTS powders is obtained by the sample calcined at 650°C for 2 h. The microstructure of the 0.94BNT-0.06BCTS powders showed an almost-circle shape and the average particle size increased from 218 to 298 nm when the calcination temperature was increased from 600 to 900°C. The XRD pattern of all ceramics presented a single perovskite structure with the co-existence of the rhombohedral and tetragonal phase. The average grain size increased with increasing sintering temperature. The density, dielectric constant (at Tr and Tm) and piezoelect... |
| Databáze: | OpenAIRE |
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