Thermal stabilities of electromechanical properties in cobalt-modified strontium bismuth titanate (SrBi4Ti4O15)
| Autor: | Hu-He Tian, Chun-Ming Wang, Qian Wang, Qing-Wei Fu, Zhao-Peng Cao, De-Fu Yin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Piezoelectric sensor Bismuth titanate chemistry.chemical_element Mineralogy 02 engineering and technology Dielectric 01 natural sciences Bismuth chemistry.chemical_compound 0103 physical sciences Materials Chemistry Ceramic Composite material 010302 applied physics Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology Ferroelectricity Piezoelectricity chemistry Mechanics of Materials visual_art visual_art.visual_art_medium 0210 nano-technology Cobalt |
| Zdroj: | Journal of Alloys and Compounds. 674:37-43 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2016.03.022 |
| Popis: | Bismuth layer-structured ferroelectric (BLSF) strontium bismuth titanate (SrBi 4 Ti 4 O 15 , SBT) ceramic oxides with B -site cobalt substitutions have been synthesized using conventional solid–state reaction. The dielectric, piezoelectric, and ferroelectric properties of cobalt-modified SBT are investigated in detail. The results indicate that cobalt is very effective in promoting the piezoelectric performance of SBT. The SBT modified with 3 mol% Co 3+ (SBT-3Co) exhibits the optimized piezoelectric properties, with a piezoelectric constant d 33 of 28 pC/N, which is the highest value among the modified SBT-based piezoelectric ceramics ever reported. The temperature-dependent electrical impedance, resonance frequencies, and electromechanical coupling factors ( k p and k t ) reveal that the cobalt-modified SBT ceramics have good thermal stabilities of electromechanical properties up to 300 °C. These results demonstrate that the cobalt-modified SBT ceramics are promising materials for high temperature piezoelectric sensors applications. |
| Databáze: | OpenAIRE |
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