摘要
研究了施主掺杂离子Nb^5＋对Pb（Zn1/3Nb2/3）0.2Ti0.4Zr0.4O3 （PZN-PZT） 压电陶瓷微观结构和电性能的影响. Nb2O5加入量为0.0%～1.0%, 样品制备采用钶铁矿前驱体方法. 通过扫描电镜（SEM）和X射线衍射（XRD）分析, 确定了Nb2O5在钙钛矿主晶格中的固溶限度为0.5%左右. 少量Nb2O5能够抑制晶粒生长, 并导致四方相向三方相转变和晶体四方度的降低;而过量Nb2O5对晶粒尺寸、相转变和晶格畸变没有显著影响. 材料的电性能随Nb2O5加入量的增加而呈现极值型变化, 最优电性能在固溶限度处.
Effects of the donor ion Nb^5＋ on microstructure and electric properties of Pb （Zn1/3 Nb2/3 ）0.2 Ti0. 4Zr0.4O3 （PZN-PZT） piezoelectric ceramics were investigated. The Nb2O5 contents were from 0.0% to 1.0% and the specimens were prepared using the columbite precursor method. Based on the analysis of scanning electronic microscope （SEM） and the X-ray diffraction （XRD） in the Nb2O5 doped ceramics, the solubility limit of Nb2O5 in the perovskite structure was estimated at about 0.5%. Small amount of Nb2O5 could inhibit the growth of grains, and cause the phase transition from tetragonal to rhombohedral as well as the tetragonality of crystal decreasing. However, excessive Nb2O5 had no obvious influence on the grain size, phase transition and lattice distortion. The electric properties of the materials exhibited the extreme with the increase of Nb2O5 addition. The most optimum electric properties were obtained at the point of the solubility limit.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2007年第2期248-252,共5页
Chinese Journal of Rare Metals
基金
河南工业大学科研基金资助项目(05101)
