摘要
采用传统固相烧结法,在1060℃制备(K_(0.5)Na_(0.5)Nb_(1-x)Sb_xO_3(KNNS,x=0、0.01、0.02、0.03和0.04)无铅压电陶瓷,研究了Sb掺杂对KNN陶瓷物相结构、微观形貌和电学性能的影响。研究结果表明:Sb可以取代钙钛矿结构中B位的Nb位置,Sb取代Nb的最大量为0.03≤x≤0.04,当x=0.04时产生杂相;通过XRD图谱分析表明,x=0时陶瓷为单一的正交相结构,0.02≤x≤0.03时为正交-四方相共存,x=0.04时转变为三方相结构。Sb的掺杂具有细化晶粒的作用,随着Sb含量的增加,晶粒平均尺寸减小,晶粒大小变得均匀,介电性能增强。
Lead-free piezoelectric ceramics （ K05Na0.5 ） Nb1-xSbxO3 （ KNNS, x = 0, 0.01, 0.02, 0.03 and 0.04） were synthesized by conventional solid state sintering method at 1080 ℃. The effect of Sb doping on the phase structure, microscopic morphology and electrical properties of KNN ceramics samples was investigated. The results show that Sb can replace the Nb in B site of the perovskite structure, and the maximum amount of Sb in the KNN structure was 0. 034）. 04. The analysis of XRD patterns shows that the ceramic have a single orthorhomhic phase structure when x = 0, a co-existed phases orthorhombic and tetragonal phases structure at 0.02 ≤x≤0.03, and transformed into the rhombohedral phase at x = 0.04. The doping of Sb has the function of refining grain. With increaseing the Sb content, the average grain size decreases, the grain size becomes uniform and the dielectric performance were enhanced.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2018年第2期338-342,共5页
Journal of Synthetic Crystals
基金
国家自然科学基金(51262017
51362017)
稀贵金属先进材料协同创新基金(14051708)
稀贵金属综合利用新技术国家重点实验室开放基金(SKL-SPM-201502)
关键词
无铅压电陶瓷
固相烧结法
KNN
钙钛矿结构
掺杂改性
lead-free piezoelectric ceramics
solid state sintering method
KNN
perovskite structure
doping modification
