Abstract
A novel perovskite lead-free solid solution of (Ba0.06Bi0.47Na0.47)1-xLaxTi1-yZryO3 were designed by dual-substitution of La3+ and Zr4+ for (Ba0.06Bi0.47Na0.47)2+ and Ti4+. The frequency-, temperature- and fatigue-dependent energy storage properties of the materials were investigated. After the dopings of La3+ and Zr4+, the crystal structure of the ceramics remains unchanged; and tetragonal and rhombohedral phases coexist in all ceramics which exhibit a relaxor phase transition. The co-substitution of La3+ and Zr4+ leads to the high dielectric breakdown strength (DBS), large spontaneous polarization (Ps) and small remnant polarization (Pr) of the materials. The optimum energy storage properties are achieved at x/y = 0.02/0.04, giving high recoverable energy storage density of Wrec ~1.55 J/cm3, excellent energy storage efficiency of ƞ ~72.6% and large dielectric breakdown strength of DBS ~136 kV/cm. Furthermore, the ceramic with x/y = 0.02/0.04 possesses superior durability of frequency (~2–60 Hz), fatigue (~ 103) and temperature (~ 25–245 °C).
Original language | English |
---|---|
Pages (from-to) | 23233-23240 |
Number of pages | 8 |
Journal | Ceramics International |
Volume | 45 |
Issue number | 17 |
DOIs | |
Publication status | Published - 1 Dec 2019 |
Keywords
- BiNaTiO
- Energy storage properties
- Fatigue
- Frequency
- Solid solution
- Thermal stability
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry