pH Affect on the Structural a nd Morphological Properties of Barium Hexaferrite Nanopa rticles Synthesized by Co-precipitatio n Method

Hexag onal ferrites are a wide family of ferromag netic oxides, with pec uliar and useful prope rties. The crystal structu re of the different know n types of hexagonal ferrites (M, W, X, Y, Z and U) is very complex and can be considered a s a superposition of R a nd S blocks along the he xagonal c a xis, RSR*S * for M-type [۱]. Barium hexaferrite (BaFe۱۲O۱۹) is a famous permanent magnetic material due to its high coercivity and fairly large crystal anisotropy [۲]. Sever al chemical methods ha ve been used to prepare barium ferrite, includin g co-precipitation [۳], s ol–gel tech nique [۴], h ydrothermal method [ ۵] and etc. Among th ese method s, co-precipitation is one of the simplest techni ques.In the present work barium hexaferrite p owder has been prepared by co-precipitation method using metallic nitrates of ba rium and ir on as precursors and s tudied by X -Ray Diffr action (XRD) and Scann ing Electro n Microscop e (SEM).

کلیدواژه ها:

Barium Hexa ferrite ، Co-precipitatio n ، Magneti c Nanoparticles ، Permanent Magnets.