摘要
采用普通的固相烧结方法制备了LixNa(0.52-x)K0.48NbO3无铅压电陶瓷,研究了陶瓷的显微结构及压电性能。随着Li含量的增加陶瓷烧结温度降低,相结构逐渐由正交相向四方相转变。在x=0.05时,压电常数d33达到117pc/N,平面机电耦合系数kp为36.4%,介电损耗tanδ为0.032。
Lead-free LixNa（0.52-x）K0.48NbO3 piezoelectric ceramics were prepared by a solid reaction method. The piezoelectric properties and microstructure of LixNa （0.52-xK0.49NbO3 were investigated. The results show that all specimens exhibit a perovskite structure and the phase structure at room temperature transforms from orthorhombic to tetragonal with the increase of Li. Meanwhile, The densities were heightened and sintedng temperature was decreased. The Li,Na （0.52-x）K0.49bO3 （x=0.05） ceramics exhibits an excellent piezoelectric properties with the piezoelectric constant d33, the electromechanical coupling coefficient kp, Loss tangent tanδ of 117pc/N, 36.4%,and 0.032,respectively.
出处
《陶瓷学报》
CAS
2007年第3期232-236,共5页
Journal of Ceramics
基金
国家自然科学基金(编号:50562002)
教育部新世纪优秀人才支持计划(编号:NECT-06-0576)
江西省重点攻关项目(编号:赣科计[2005]52号)
江西省自然科学基金(编号:0650074)
关键词
无铅压电陶瓷
压电性能
钙钛矿结构
lead-free piezoelectric ceramics, piezoelectric properties, perovskite structure
