THE EFFECT OF Mn AND Ti SUBSTITUTED BARIUM FERRITE ON THE ELECTROMAGNETIC MICROWAVE ABSORBER IN THE X-BAND RANGE

The compositional dependence of the electromagnetic wave absorption properties of barium ferrite (bafe12 o19) in which ti and mn were substituted for fe, was investigated .single phase m-type structure was obtained for bafe12-x(ti0.5mn0.5)xo19 sintered samples with composition 0≤x≤4.5 . the frequency dependence of reflection loss (r.l) obtained a minimum value of -21db for the x-band frequency range (8-12ghz), and give a band width greater than 1ghz in the same frequency range . the grain size of the prepared powder were between ( 7.05-12.06 μm) .barium ferrite-resin composites with 30,40,and 50 mass% ferrite exhipted a wide band width with r.l<-21 db .the composite samples with composition x=3.5 and x= 4.5 had wide bandwidth of 2.5 and 1.7 ghz respectively and a r.l of-12.5 and -16 db respectively it may be concluded that barium m-type ferrite with substitution by ti and mn is a good candidate in the x-band frequency range