不同气氛下柠檬酸铁制备铁氧化物的研究  

Studies on the synthesize iron oxide from ferric citrate under different atmosphere

作　　者：石磊[1] 刘洪波[1] 何月德[1] 夏笑虹[1] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《功能材料》2010年第2期253-255,259,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50872032)

摘　　要：以柠檬酸铁为原料,分别在富氧和无氧气氛中经热处理得到铁氧化物,利用TG技术研究了柠檬酸铁在不同气氛下的热解过程,采用XRD技术研究了不同气氛下柠檬酸铁反应温度与反应时间对产物组分、结构的关系。结果表明:柠檬酸铁在空气气氛的热解产物为Fe3O4,提高反应温度或延长反应时间均有利于Fe3O4向α-Fe2O3的转变。然而,柠檬酸铁在无氧气氛的热解产物为Fe3O4与无定形热解炭,增加反应温度和/或延长反应时间会促进Fe3O4向Fe、FeO的转变。Iron oxides were prepared by heat-treating ferric citrate under rich-oxide and non-oxide atmosphere.The pyrogenations of ferric citrate at different atmospheres were characterized by the technique of TG.The relation between the reaction temperature ＆ reaction time of pyrolyze ferric citrate and the composition,structure of iron oxide were studied by XRD.The results show that the pyrolytic products under air atmosphere are Fe3O4,the transformation of α-Fe2O3 from Fe3O4 is enhanced with increasing reaction temperature or prolonging reaction time;while,the pyrolytic products under non-oxide atmosphere are Fe3O4 and amorphous carbon,the redox reaction between Fe3O4 and amorphous carbon is promoted by increasing reaction temperature or prolonging reaction time.

关 键 词：柠檬酸铁 铁氧化物 热处理 

分 类 号：TB383[一般工业技术—材料科学与工程]