CAJ | 학술논문

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Fe_3O_4,提高反应温度或延长反应时间均有利于Fe_3O_4向α-Fe_2O_3的转变.然而,柠檬酸铁在无氧气氛的热解产物为Fe_3O_4与无定形热解炭,增加反应温度和/或延长反应时间会促进Fe_3O_4向Fe、FeO的转变.
이저몽산철위원료,분별재부양화무양기분중경열처리득도철양화물,이용TG기술연구료저몽산철재불동기분하적열해과정,채용XRD기술연구료불동기분하저몽산철반응온도여반응시간대산물조분、결구적관계.결과표명:저몽산철재공기기분적열해산물위Fe_3O_4,제고반응온도혹연장반응시간균유리우Fe_3O_4향α-Fe_2O_3적전변.연이,저몽산철재무양기분적열해산물위Fe_3O_4여무정형열해탄,증가반응온도화/혹연장반응시간회촉진Fe_3O_4향Fe、FeO적전변.
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 Fe_3O_4,the transformation of α-Fe_2O_3 from Fe_3O_4 is enhanced with increasing reaction temperature or prolonging reaction time;while,the pyrolytic products under non-oxide atmosphere are Fe_3O_4 and amorphous carbon,the redox reaction between Fe_3O_4 and amorphous carbon is promoted by increasing reaction temperature or prolonging reaction time.