Dielectric and piezoelectric properties of Ba(Zr xTi1-x)O3 lead-free ceramics
- Resource Type
- article
- Authors
- Li, Wei; Xu, Zhijun; Chu, Ruiqing; Fu, Peng; Zang, Guozhong
- Source
- Brazilian Journal of Physics. September 2010 40(3)
- Subject
- Ceramics
Microstructure
Dielectric properties
Piezoelectric properties
- Language
- English
- ISSN
- 0103-9733
Lead-free ceramics Ba(Zr xTi1-x)O3 (x = 0.02-0.2) were prepared using a solid-state reaction technique. The structural and electrical properties were systemically investigated. Crystalline structures and microstructures were analyzed by X-ray diffraction and scanning electron microscope (SEM) at room temperature. All the samples possess pure perovskite structure. A small amount of Zr content has great effect on the microstructure of Ba(Zr xTi1-x)O3 ceramics. The homogeneous microstructure with grain size about 30µm is obtained for the sample at x = 0.05. The phase transitions merge together in one peak for the samples at x = 0.10 and the highest dielectric constant 15900 is obtained for the sample at x = 0.15. The Ba(Zr xTi1-x)O3 ceramics at x=0.05 exhibit excellent piezoelectric properties of high d33 = 208 pC/N, k p = 31.5% and Qm = 500.