摘要
以Bi(NO3)3.5H2O,Fe(NO3)3.9H2O和柠檬酸为主要原料,采用液相自组装法,以OTS单分子层为模板,在ITO玻璃基片上成功制备了BiFeO3晶态薄膜。研究了退火温度以及保温时间对BiFeO3薄膜的影响。利用DSC/TG对铁酸铋前驱物结晶行为进行了表征,利用XRD和FE-SEM等测试手段对不同退火工艺下制备的BiFeO3薄膜进行了物相和表面形貌的表征。结果表明,BiFeO3晶态薄膜的结晶转变温度在440℃左右;实际上在550℃退火2h的条件下得到了纯相BiFeO3薄膜,薄膜表面致密,晶粒发育完整,尺寸均匀,无明显缺陷;退火温度过高,会导致杂相生成,晶粒异常长大;保温时间过长,会导致BiFeO3高温分解。
OTS as stencil,BiFeO3 films were successfully prepared on ITO/glass substrates by liquid phase self-assembled method using Bi（NO3）3·5H2O,Fe（NO3）3·9H2O and citrate acid as raw materials.The influence of annealing temperature and holding time on BiFeO3 films were studied.The crystalline behavior of BiFeO3 precursor particles were characterized by DSC/TG,the phase and surface morphology of BiFeO3 films prepared under different annealing process were characterized by XRD and FE-SEM.The results indicated that：the crystalline transition temperature of crystalline BiFeO3 films are around 440℃;the pure phase BiFeO3 films are actually obtained after annealing at 550℃ for two hours,the surface of the films are smooth and dense,the grains are completely developed and well-distributed,no obvious defect could be seen;grains would grow abnormally and impurity phase would forms when the annealing temperature is too high;BiFeO3 would pyrolyses when the holding time was too long.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2011年第2期373-375,共3页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50872077)
陕西科技大学科研创新团队基金资助项目(TD09-05)
