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.
سعيد الراشد | Saeed AlRashid | 3982