Low-Temperature Sintering of ZnO and B2O3 Co-doped (K0.5Na0.5)NbO3 Lead-Free Piezoelectric Ceramics
Lead-free K0.5Na0.5NbO3-xwt％ (0.4ZnO-0.6B2O3) ceramics were synthesized by conventional ceramics process. The co-doping of ZnO and B2O3 can decrease the sintering temperature of K0.5Na0.5NbO3 ceramics to 1000℃, and the samples show high relative density around 96％. X-ray diffraction (XRD) reveals that Co-doping of ZnO and B2O3 induces lattice distortion. Liquid phase is observed by scanning electron microscopy (SEM), which is resulted from the addition of ZnO and B2O3. The ceramics show better piezoelectric and dielectric properties with planar electromechanical coupling factor kp= 40.7％, piezoelectric constant d33=117pC/N, dielectric constant εT 33/ε0=318.6, and loss tangent tanδ=0.034.
Lead free piezoelectric ceramics KNN Low temperature sintering Co-doped
Rongxia Huang Yuzhen Zhao Yongjie Zhao Rongzheng Liu Heping Zhou
State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science andEnginee State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engine
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
315-320
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）