溶胶-凝胶自燃烧合成法制备纳米锶铁氧体及红外光谱研究

The Preparation of the Ultrafine Powder of SrFe₁₂O₁₉ by the Auto-combustion Process of Nitrate-citrate——The Study of the IR Spectra

摘要: 采用溶胶-凝胶与自燃烧相结合的技术,制备了纳米锶铁氧体,并对不同煅烧温度及时间所得样品的红外吸收光谱进行了分析,对锶铁氧体的形成过程有了更进一步的认识,得出锶铁氧体的较佳生成条件.结果得出:经柠檬酸溶胶凝胶法制得的干凝胶粉,自燃烧后,在850℃的条件下煅烧1h,能得到单一相的SrFe₁₂O₁₉纳米粉末.

Abstract: The SrFe₁₂O₁₉ ultrafine powder were synthesized by the combustion of material made by sol-gel method. The powder calcined at different temperature and time was studied, and the synthesized process of SrFe₁₂O₁₉ was analysed by FTIR. It is concluded that the SrFe₁₂O₁₉ fine powder with a particle size less than 30 nm can be obtained under the condition of auto-combustion and at calcination temperature of 850℃(1 h).