Temperature stability and electrical properties of Tm 2 O 3 doped KNN-based ceramics
Journal of Materials Science: Materials in Electronics(2019)
摘要
For green development concern, lead-free piezoelectric ceramics 0.96(K 0.48 Na 0.52 )Nb 0.96 Sb 0.04 O 3 –0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 – x mol%Tm 2 O 3 fabricated via conventional solid state method are studied. The analyses of X-ray diffraction and Raman dates show the coexistence phase of orthorhombic–tetragonal. Meanwhile, the tetragonal fraction increases with increasing Tm contents. Both the Cure temperature and the responding maximum permittivity decline with increasing x . At the same time, there are diffuse phase transition and relaxation-like phenomena after doping Tm. The activation energy, obtained from Arrhenius equation, suggests that there is a mixed conduction mechanism by both single-ionized and doubly oxygen vacancy diffusion. The temperature stabilities of remnant polarization and unipolar strain are significantly improved in the temperature range of 30–150 °C. Rare earth element Tm is useful for improving the temperature stability of the KNN-based piezoelectric ceramics.
更多查看译文
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要