Effect of (K0.5Ce0.5) complex on the electrical properties of lead‐free Bi4Ti2.86W0.14O12 high‐temperature piezoelectric ceramics
| Autor: | Zong-Yang Shen, Chen Qin, Fusheng Song, Wen-Qin Luo, Yueming Li, Zhumei Wang, Zhipeng Zhang |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Mechanical Engineering Doping Analytical chemistry chemistry.chemical_element 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Piezoelectricity Bismuth chemistry Mechanics of Materials Electrical resistivity and conductivity visual_art 0103 physical sciences visual_art.visual_art_medium Curie temperature General Materials Science Ceramic 0210 nano-technology |
| Zdroj: | Journal of Materials Research. 36:1134-1141 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/s43578-020-00078-1 |
| Popis: | Potassium and cerium co‐doped Bi4Ti2.86W0.14O12 ceramics with a formula of (K0.5Ce0.5)xBi4−xTi2.86W0.14O12 (abbreviated as KC100x‐BITW, x = 0, 0.02, 0.04, 0.06, 0.08, 0.1) were prepared by a conventional solid‐state reaction method. The effect of (K0.5Ce0.5) complex doping amount on the structure, dielectric, and piezoelectric properties of the KC100x‐BITW ceramics was investigated. X‐ray diffraction results indicated that the KC100x‐BITW ceramics are Aurivillius‐type phase with the bismuth layer structure. (K0.5Ce0.5) complex addition first increases and then decreases the grain size which can be observed by scanning electron microscopy. With the increase of (K0.5Ce0.5) complex doping amount, the Curie temperature (TC) was slightly decreased from 632 to 608 oC. The dielectric and piezoelectric properties were optimized in KC100x‐BITW ceramics with x = 0.08 as follows: d33 = 24 pC/N, kp = 8.2%, Qm = 6766, er = 135 (@100 kHz), tanδ = 0.28% (@100 kHz), Tc = 611 oC, and resistivity ρ = 2.9 × 106 Ω cm at 500 oC, indicating that the KC100x‐BITW ceramics are suitable for high‐temperature piezoelectric sensing applications. |
| Databáze: | OpenAIRE |
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