In this work the effect of nonmagnetic oxide
additives on microstructure and magnetic propperties or
barium ferrite is studied. Two groups of samples were
prepared, one with limonite and the other with hematite,
both huving similar barium carbonate. The conventional wet
ceramic tcdlnitjuc was used for the preparalion of the
samples and the percentage o f different impurities in the
raw materils was determined by XRF and atomic absorption
Ler..:hniques. The magnetic results ob tained for the first
group arc suppcrior und their grian sizes arc smaller us
compared to the second group. By adjusting only two or the
additives (Al z0 3 and Si0 2) in the second group the
magnetic parameters were improved and the grain sizes
were reduced. The inhibiting effect of Si02 on grain growth
mcr..:hanism during sintering is also discussed.