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Effect of sintering temperature and time on densification, microstructure and properties of the PZT/ZnO nanowhisker piezoelectric composites |
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| Authors: | Da-Wei WangMao-Sheng Cao Jie YuanHong-Bo Li Hai-Bo LinQuan-Liang Zhao De-Qing Zhang |
| Affiliation: | a School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China b School of Information Engineering, Central University for Nationalities, Beijing 100081, China c China Astronautics Standards Institute, Beijing 100071, China |
| Abstract: | Lead zirconate titanate (PZT) based piezoelectric composites embedded with ZnO nanowhiskers (ZnOw) were investigated to clarify the optimal sintering condition for densification, microstructure, and electrical properties. The samples are characterized by X-ray diffraction analysis and scanning electron microscopy. The results show that the increase of the sintering temperature and time is quite effective in improving the densification and piezoelectric properties of the PZT/ZnOw composites. However, the relative density and piezoelectric properties deteriorate as the composites are sintered over the optimal sintering condition. Particularly, the PZT/ZnOw composites sintered at 1150 °C for 2 h show excellent electrical properties of piezoelectric constant d33 ∼ 471 pC/N, relative dielectric constant ? ∼ 3838, planar electromechanical coupling factor kp ∼ 0.543, remnant polarization Pr ∼ 23.2 μC/cm2 and coercive field Ec ∼ 9.2 kV/cm. |
| Keywords: | Composite materials PZT Sintering Piezoelectricity |
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