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- Title
Effect of different MnO<sub>2</sub> phases (β-, γ-, and ε-) on the microstructure and piezoelectric properties of Pb(Zr<sub>1/2</sub>Ti<sub>1/2</sub>)O<sub>3</sub>–Pb(Zn<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>–Pb(Ni<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub> ceramics for energy harvesting
- Authors
Liu, Junting; Li, Leilei; Liu, Zhennan; Wu, Wanli; Wang, Yujian; Xu, Jie; Gao, Feng
- Abstract
This study reports 0.83Pb(Zr1/2Ti1/2)O3–0.11Pb(Zn1/3Nb2/3)O3–0.06Pb(Ni1/3Nb2/3)O3 (PZNNT) ceramics doped with MnO2 were obtained through the conventional solid-state reaction method. The effects of MnO2 additive with different phases (β-, γ-, and ε-) on the microstructure and piezoelectric properties of PZNNT ceramics were discussed under the same condition. On the basis of X-ray photoelectron spectroscopy (XPS), the results clearly showed that Mn ions in different crystal forms of MnO2 could convert from Mn4+ ions to diverse valence states (Mn2+, Mn3+) and produce different oxygen vacancies. Furthermore, the relevant electric properties of samples increased as follows: PZNNT/β-MnO2 < PZNNT/ε-MnO2 < PZNNT/γ-MnO2. The optimal electric properties could be obtained by adding 1.5 mol% γ-MnO2, the energy conversion factor (d33 × g33), the mechanical quality factor (Qm), the electromechanical coupling factor (kp), and the Curie temperature (Tc) which were 9859 × 10−15 m2/N, 357, 0.556, and 315 °C, respectively. It indicates that γ-MnO2-modified PZNNT ceramics are potential candidate materials for piezoelectric energy harvesting.
- Subjects
ENERGY harvesting; LEAD titanate; LEAD oxides; ELECTRIC properties; X-ray photoelectron spectroscopy; PIEZOELECTRIC materials; CERAMICS
- Publication
Journal of Materials Science: Materials in Electronics, 2019, Vol 30, Issue 24, p21297
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-019-02504-5