Journal
ADVANCES IN APPLIED CERAMICS
Volume 107, Issue 4, Pages 222-226Publisher
MANEY PUBLISHING
DOI: 10.1179/174367608X263403
Keywords
lead tree; piezoelectric ceramics; morphotropic phase boundary; piezoelectric properties; dielectric properties
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Funding
- National Natural Science Foundation of China [50702022, 20773040]
- Open Project Programme of Key Laboratory of Silicate Materials Science and Engineering (Wuhan University of Technology)
- Ministry of Education, China [SYSJJ2007-11, KF0701]
- Open Project Programme of Low Dimensional Materials and Application Technology (Xiangtan University)
- Natural Science Fundation of Guangdong Province, China [07006555]
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Lead free piezoelectric ceramics (1-x)Bi-0.5(Na0.84K0.16)(0.5)TiO3-xBa(Zr0.04Ti0.96)O-3 (BNKT-BZT100x, wherein x ranged from 0 to 10 mol.-%) were fabricated by a conventional mixed oxide route, whose BZT content effect on electrical properties and crystalline structures was investigated. X-ray diffraction investigation showed that BZT effectively diffused into BNKT lattice and formed a solid solution during sintering, and their crystalline structures changed from rhombohedral phase to tetragonal phase as the BZT content was increased. Piezoelectric property measurements revealed that the BNKT-BZT4 ceramics had the highest piezoelectric performance: piezoelectric constant d(33) reached 178 pC N-1 and planar electromechanical coupling factor k(p) was up to 0.33. The influence of Bi2O3 doped content on electrical properties and crystalline structure of the BNKT-BZT4 ceramics were also studied, and found that the piezoelectric property of the ceramics was enhanced when Bi2O3 was doped.
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