EFFECT OF MILLING ON SOL-GEL AUTO-COMBUSTION SYNTHESIS OF NANO CRYSTALLINE STRONTIUM HEXAFERRITE

Strontium hexaferrite has been intensively investigated during the last decades due to its technological interest as a permanent magnet and magnetic recording media. Several techniques have been used to prepare strontium hexaferrite nano crystalline such as: hydrothermal synthesis, salt melt method, co-precipitation, sol–gel and sol–gel auto-combustion methods [1]. The combination of chemical routes and high-energy ball milling method has been recently considered as a new technique for producing of nano crystalline magnetic ceramics. In this research, nano crystalline strontium hexaferrite has been synthesized by sol-gel auto-combustion process and calcination after high-energy milling