纳米氧化铁的制备及其相变研究  

Study on Preparation and Phase Transition of Nanometer Iron Oxide

作　　者：杨信成 薛永强[2] YANG Xin-cheng;XUE Yong-qiang(Hunan Anchun Advanced Techology Co.,Ltd.,Changsha Hunan 410006,China;Department of Applied Chemistry,Taiyuan University of Technology,Taiyuan Shanxi 030024,China)

机构地区：[1]湖南安淳高新技术有限公司,湖南长沙410006 [2]太原理工大学应用化学系,山西太原030024

出　　处：《辽宁化工》2020年第10期1253-1255,1265,共4页Liaoning Chemical Industry

摘　　要：利用共沉淀法制备了Fe3O4和γ-Fe2O3纳米微粒。应用IR和XRD表征方法,研究了煅烧时间和煅烧温度对纳米粒子成分、晶型和粒径的影响,同时还应用TG/DTA研究了其相变行为。结果表明:煅烧温度为300℃、煅烧时间为2.5 h,Fe3O4能够完全转化为γ-Fe2O3。XRD表征证实,只要未发生相变,煅烧温度和煅烧时间对粒径没有明显的影响。同时,在450℃左右可能发生结构相变,相变顺序为γ-Fe2O3→α-Fe2O3。Fe3O4 andγ-Fe2O3 nanoparticles were prepared by co-precipitation method.Using IR and XRD characterization methods,the effect of calcination time and calcination temperature on the composition,crystal form and particle size of nanoparticles were studied.At the same time,TG/DTA was used to study the phase transition behavior.The results showed that,when the calcination temperature was 300℃,the calcination time was 2.5 h,and Fe3O4 was completely converted intoγ-Fe2O3.The XRD characterization results showed that,as long as there was no phase change,the calcination temperature and calcination time had no significant effect on the particle size.The structural phase transition occurred at about 450℃,the phase transition sequence wasγ-Fe2O3→α-Fe2O3.

关 键 词：Γ-FE2O3 共沉淀 结构相变 制备 

分 类 号：TQ026.8[化学工程]