تاثير افزودن يون كروم بر آناليز فازي، ريزساختاري و خواص مغناطيسي بدنه هاي هگزافريت استرانسيوم تهيه شده به روش حالت جامد

The Effect of Chromium Ion Addition on Phase Analysis, Microstructure and Magnetic Properties of Strontium Hexaferrite Bodies Prepared by Solid State Synthesis

Strontium hexaferrite bodies attracted more attention in various industries such as: microwave, Dc motors, agriculture (irrigation) and etc. In this research, the effect of chromium ion addition on phase analysis, microstructure and magnetic properties of strontium hexaferrite bodies prepared by solid state sy nthesis have been investigated. Results show that not only molar ratio of iron oxide and strontium oxide(n = 6) but also first firing temperature( 1210°C) to form magnetic phase of strontium hexaferrite and second firing temperature (1220°C) to obtain suitable magnetic properties of strontium hexaferrite bodies at presences of chromium must be considered. XRD and SEM investigations showed that optimum amount of chromium is 0/3 (SrCr0 :,Fei l -7Om). Magnetic coereivity, remanent magnetization and rectangularity ratio (Hk/HCj) of sample were 3995 Oe, 3719 Gs and 83/5%, respectively.