摘要
采用Sol-gel法制备出Bi1-xLnxFeO3(BLnF;x=0、0.05、0.10、0.15、0.20;Ln=Eu,Ho和Er)系列粉末,利用XRD分析了其晶格结构。结合容忍因子的变化分析了3种元素掺杂对BiFeO3晶格结构的影响规律,以及掺杂离子半径变化对BiFeO3晶格结构的影响趋势。结果表明,在450～550℃烧结可以得到纯相的BiFeO3粉末,烧结温度过高,容易形成Bi2Fe4O9杂相;掺杂量增加,晶格参数减小;掺杂离子半径减小,晶格参数减小;Eu、Ho和Er元素掺杂量低于0.10时,可以得到纯相的BLnF,掺杂量超过0.10后,晶格结构的稳定性变差,容易形成杂相。
The series of Bi1-xLnx FeO3 （BLnF; x=0, 0. 05, 0. 10, 0, 15, 0. 20; Ln=Eu, Ho and Er） powders are prepared by sol-gel method, and they are analyzed by XRD technique. Associated with tolerance factor, effect of the doping and ionic radius of lanthanide on the crystal structure of BiFeO3 is investigated. The results show that when the powder is sintered at 450 -550℃, the single-phase BiFeO3 powder is obtained. The mixture of BiFeOa and Bi2 Fe4O3 phases is formed when the sintering temperature above 550℃. With the Ln content increasing or the Ln ionic radius decreasing, the lattice parameters decrease. When the Ln content exceeds 0. 10, the stability of the crystal structure deteriorates, and it is easily to form the impurity phase.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2010年第14期8-10,共3页
Materials Reports
基金
中国科学技术部国际科技合作项目(2009DFB50470)
国家自然科学基金青年科学基金(50902108)
