摘要
采用传统固相反应法制备了Y2O3掺杂(Bi0.5Na0.5)0.94Ba0.06TiO3(简写为BNBT6)陶瓷[简称为BNBT6-x(wt%)Y2O3陶瓷]。研究了Y2O3(0.2wt%～0.8wt%)掺杂对BNBT6陶瓷的结构、介电、压电、铁电性能的影响。结果表明,所有Y2O3掺杂陶瓷样品均形成了单一的钙钛矿结构;陶瓷的介电、压电、铁电性能受Y2O3掺杂的影响较为显著:当掺杂0.4wt%Y2O3时,10kHz频率下测得的室温εr达到1530,且tanδ较小,为0.050,d33达到152pC/N,kp=0.27,Qm=134。掺杂0.2wt%的Y2O3时BNBT6陶瓷的d33为145pC/N,kp增大到0.29,Qm达到173,tanδ为0.053;掺杂适量YO的BNBT6陶瓷铁电性能也得到改善。
Y2O3（0-0.8wt%）-doped（Bi0.5Na0.5）0.94Ba0.06TiO3 lead-free piezoelectric ceramics were synthesized by conventional solid-state reaction.The influence of Y2O3 on the microstructure,the dielectric and piezoelectric properties of the composites was investigated.X-ray diffraction（XRD）patterns indicate that 0.2wt%-0.8wt% of Y2O3 is diffused into the lattice of BNBT6 ceramics to form the pure perovskite phase.At room temperature,the ceramics doped with 0.4wt% Y2O3 shows superior performance with high piezoelectric constant（d33 = 152 pC/N）,high planar coupling factor（kp =0.27）,high mechanical quality factor（Qm =134）,high relative dielectric constant（εr =1530）and lower dissipation factor（tanδ = 0.050）at a frequency of 10 kHz.The ceramics doped with 0.2wt% Y2O3 have higher planar coupling factor（kp=0.29）and mechanical quality factor（Qm=173）.The appropriate Y2O3（0.4wt%）can improve the ferroelectric property of the BNBT6 ceramics.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2010年第3期602-607,共6页
Bulletin of the Chinese Ceramic Society
基金
国家科学自然基金(No.50602021
No.50802038)
聊城大学大学生科技文化创新项目(SRT08004CL2)
