摘要
综述了Bi0.5Na0.5TiO3(BNT)基无铅压电陶瓷体系研究的最新进展,介绍了BNT基无铅压电陶瓷的设计方法及其制备技术。用自洽场离散变分法(self-consultcharge–discretevariation-Xα,SCC–DV-Xα)等计算方法可为设计新型BNT基陶瓷提供重要的理论指导。用湿化学法,包括:溶胶–凝胶法、柠檬酸盐法、水热法等,可以合成BNT基纳米粉体,该类方法制备的BNT基粉体具有良好烧结活性,利于致密化烧结,使材料电性能得到改善。用模板晶粒生长技术可获得晶粒生长定向程度很高的BNT基压电陶瓷材料,进而提高材料在特定方向的压电性能。
Recent advances in research of Bi0.5Na0.5TiO3（BNT）-based lead-free piezoelectric ceramics are reviewed, and the design and synthesis methods of BNT-based ceramics are introduced. The design methods such as self-consult charge-discrete variation-Xa（SCC-DV-Xa）can provide important theoretical direction for the development of new BNT-based ceramics. The BNT-based nanopowders can be synthesized by the wet-chemical methods, including the sol-gel method, citric-gel method and hydrothermal method. The BNT-based nanopowders synthesized by these methods have good sintering activity, and nanopowders can be sintered more compactly, so the electrical properties of the materials can be improved. Highly textured the BNT-based lead-free piezoelectric ceramics can be prepared by template grain growth method, and the piezoelectric properties of special orientation can be greatly enhanced.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2006年第12期1514-1521,共8页
Journal of The Chinese Ceramic Society
基金
华南理工大学特种功能材料及其制备新技术教育部重点实验室研究基金(324E4040020)
华南理工大学自然科学青年基金(324E5041330)
关键词
钛酸铋钠
无铅压电陶瓷
设计
晶粒定向
综述
bismuth sodium titanate
lead-free piezoelectric ceramics
design
grain orientation
review
