We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effects of ZnO nanoneedles addition on the mechanical and piezoelectric properties of hard PZT-based composites.
- Authors
Li, Hong-Bo; Li, Yong; Wang, Da-Wei; Lu, Ran; Yuan, Jie; Cao, Mao-Sheng
- Abstract
Hard PZT (PZT4)-based composites embedded by ZnO nanoneedles (denoted as PZT/ZnO) were fabricated by a solid state sintering technique. The characteristic diffraction peaks of the perovskite PZT and ZnO phases were identified from the studied composites, indicating the retention of ZnO. With increasing ZnO content, the grain size of the composites was reduced gradually. In contrast with the pure PZT, the PZT/ZnO composites possessed more excellent mechanical properties, while the piezoelectric properties were reduced by a certain extent. The best mechanical properties of PZT/ZnO composites were obtained by sintering at 1,150 °C with 1.5 wt% ZnO nanoneedles addition: fracture toughness K ~ 2.04 MPa m, flexural strength σ ~ 105.44 MPa, compressive strength σ ~ 543.89 MPa. The piezoelectric properties of the PZT/ZnO composites were found to be lower than that of the pure PZT with dielectric permittivity ε of 768-893, piezoelectric coefficient d of 240-260pC/N, mechanical quality factor Q of 340-650 and planar electromechanical coupling k of 0.5-0.55.
- Subjects
PIEZOELECTRICITY; X-ray diffraction; COMPRESSIVE strength; DIELECTRIC properties; SINTERING
- Publication
Journal of Materials Science: Materials in Electronics, 2013, Vol 24, Issue 5, p1463
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-012-0953-9