摘要
采用固相反应法制备了Ba_(2)SrCe_(2)TbO_(9)(简称B2SC2T)陶瓷.通过X射线衍射(XRD)、电子顺磁共振(EPR)和X射线光电子能谱(XPS)技术研究了B2SC2T陶瓷的晶体结构和缺陷化学.XRD结果表明,B2SC2T陶瓷具有三斜钙钛矿结构,ESR和XPS证明Ce以Ce^(4+)形式存在,Tb以Tb^(3+)/Tb^(4+)的混合价态形式存在.
Ba_(2)SrCe_(2)TbO_(9)ceramic(abbreviated B2SC2T)was prepared using solid-state reaction method.The crystal structure and defect chemistry of B2SC2T were investigated using X-ray diffraction(XRD),electron paramagnetic resonance(EPR)and X-ray photoelectron spectroscopy(XPS).XRD resulted indicate that B2SC2T ceramic has a triclinic perovskite structure.EPR and XPS show that Ce ions exist as Ce^(4+),and Tb ions coexist in the mixed valence states of Tb^(3+) and Tb^(4+).
作者
苏雅丽
于新宇
路大勇
刘巧丽
SU Yali;YU Xinyu;LU Dayong;LIU Qiaoli(Research Center for Materials Science and Engineering,Jilin Institute of Chemical Technology,Jilin 132022,China;School of Chemistry,Jilin University,Changchun 130021,China;The Fifth Electronics Research Institute of Ministry of Information Industry,Guangzhou 511370,China)
出处
《吉林化工学院学报》
CAS
2022年第3期30-33,共4页
Journal of Jilin Institute of Chemical Technology
基金
吉林省教育厅“十三五”科学技术项目(JJKH20200248KJ)
吉林省科技厅国际科技合作项目(20200801034GH)。
关键词
Pawley精修
缺陷化学
电子顺磁共振
X射线光电子能谱
Pawley refinement
defect chemistry
electron paramagnetic resonance
X-ray photoelectron spectroscopy
