摘要
本文以Fe(NO3)3.9H2O和Bi(NO3)3.5H2O为反应原料,以KOH为矿化剂,利用水热方法在矿化剂浓度4.5mol/L至12.0mol/L区域内制备出钙钛矿结构的BiFeO3粉体材料。经过XRD慢扫(扫描速率为0.008°/s)及peakfit软件模拟分析得知,在KOH浓度由4.5～12.0mol/L转变的过程中,产物的物相由三方相BiFeO3向六方相BiFeO3的转变。同时BiFeO3铁电性能研究也证实了以上相变的存在。
The perovskite BiFeO3 powders had been synthesized by a mild hydrothermal method,using Fe （NO3）3·9H2O and Bi （NO3）3·5H2O as raw materials,and KOH as the mineralizer,which changed in concentration from 4.5 mol/L to 12.0 mol/L.The perovskite BiFeO3 powders were characterized by XRD （scaning rate=0.008°/s） and the results were simulated by the Peakfit software.The results showed that the phase transition of the as-prepared BiFeO3 powders from rhombohedral phase to hexagonal phase is closely related to the concentration of the mineralizer.The phase transition of the BiFeO3 powders was confirmed by ferroelectric characteristics.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2010年第1期95-98,共4页
Journal of Synthetic Crystals
基金
国家自然科学基金(No.50602032)
关键词
水热合成
BIFEO3
矿化剂浓度
相变
hydrothermal synthesis
BiFeO3
mineralizer concentration
phase transition
