preparation and evaluation of nife204 and cufe204 nanoeatalysts by combination of sol- gel auto-combustion method and irradiation technique

the dried nitrate-urea gels exhibit the combination of autoicatatric combustion behavior and ultrasonic, whichcan be used to synthesize the nanocatalyst ferrite powders. cu and ni unites nanocatalyst powders sithcomposition of caned], and nife204 were synthesized by a sol-gel auto catalnic combustion process. themolar ratio between metal ions and urea was 11.2. the sob gel process was done at 80 °c. the nanopaniclecrystallines have been calcined at 800 °c.combustion behavior and crystallite size of synthesized powders were investigated iyith the help of scanningelectron microscopy observation and x-ray diffraction technique. x- ray diffraction and scanning electronmicroscopy were carried out for charactenzation of the powders. the grain size of the prepared femte powdersis found lobe in the range 30-35 mu_