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

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).