Barium Ferrite Powder

Barium Ferrite Powder

Barium ferrite powder has relatively large saturation magnetization, high coercive force and magnetic anisotropy (HA) field, as well as excellent chemical stability and corrosion resistance. In addition to traditional permanent magnet applications, ultrafine barium ferrite powder with a small particle distribution are suitable for high density perpendicular recording media as they are desirable to increase information storage capacity and reduce average noise. As we know, the classical ceramic method for producing Barium ferrite powder at high temperatures involves solid state reactions between the constituent oxides and carbonates. The disadvantages of this conventional process are also the rather large and non-uniform particle size and the introduction of impurities, which limit the further improvement of the product performance. To overcome these difficulties and meet the requirements of new applications, various wet chemical processes such as citrate-sol-gel, hydrothermal method, microemulsion process, coprecipitation technique, glass crystallization and plasma spraying of barium ferrite glass powders with excellent magnetic properties. The use of the sol-gel combustion process to synthesize reproducible, ultrafine and homogeneous barium ferrites with a narrow size distribution at a relatively low calcination temperature appears to have attracted a lot of attention in recent years. Mali et al. used a sol-gel combustion path to synthesize nano-sized barium ferrites using a nitrate-citrate gel. Shan et al. also reported that barium ferrite nanoparticles with excellent magnetic properties were prepared on the basis of the sol-gel combustion method using glucose as fuel. In our work, barium ferrites with excellent magnetic properties were prepared by sol-gel combustion technique using glycine gel. This technique has shown promising prospects due to its cost-effective precursors, ease of use, manageable conditions, and ultra-thin size of the resulting products. Furthermore, the use of glycine as a fuel instead of conventional citric acid and urea can lower the ignition temperature of the combustion and save a lot of external energy.