Authors: HongBo Li Yong Li DaWei Wang Ran Lu Jie Yuan MaoSheng Cao
Publish Date: 2013/01/04
Volume: 24, Issue: 5, Pages: 1463-1468
Abstract
Hard PZT PZT4based composites embedded by ZnO nanoneedles denoted as PZT/ZnOn 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 ZnOn With increasing ZnOn content the grain size of the composites was reduced gradually In contrast with the pure PZT the PZT/ZnOn composites possessed more excellent mechanical properties while the piezoelectric properties were reduced by a certain extent The best mechanical properties of PZT/ZnOn composites were obtained by sintering at 1150 °C with 15 wt ZnO nanoneedles addition fracture toughness K IC ~ 204 MPa m1/2 flexural strength σ f ~ 10544 MPa compressive strength σ c ~ 54389 MPa The piezoelectric properties of the PZT/ZnOn composites were found to be lower than that of the pure PZT with dielectric permittivity ε r of 768–893 piezoelectric coefficient d 33 of 240–260pC/N mechanical quality factor Q m of 340–650 and planar electromechanical coupling k p of 05–055This research was supported by the National Natural Science Foundation of China under Grant Nos 50742007 and 50872159 the National High Technology Research and Development Program of China under Grant No 2007AA03Z103 the National Defense Fund under Grant No 401050301 and the Key Laboratory Foundation of Sonar Technology of China under Grant No 9140C24KF0901
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