Anantharaman, M R; Seshan, K; Keer, H V; Shringi, S N(Springer, December 28, 1983)
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Abstract:
Optimum conditions and experimental details for the formation of v-Fe203 from
goethite have been worked out. In another method, a cheap complexing medium of starch was
employed for precipitating acicular ferrous oxalate, which on decomposition in nitrogen and
subsequent oxidation yielded acicular y-Fe203. On the basis of thermal decomposition in dry
and moist nitrogen, DTA, XRD, GC and thermodynamic arguments, the mechanism of
decomposition was elucidated. New materials obtained by doping ~'-Fe203 with 1-16 atomic
percent magnesium, cobalt, nickel and copper, were synthesised and characterized
Description:
Bull. Mater. Sci., Vol. 6, No. 1, February 1984, pp. 59--64.
Anantharaman, M R; Joseph, K V; Keer, H V(Springer, May 3, 1997)
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Abstract:
Magnetic materials meant for audio/video recording applications necessitate that
polycrystalline materials be in acicular shape. So preparation of acicular precursors for
magnetic storage materials assumes significance. The employment of aqueous solutions do not
produce needle shape crystallites. Glycerol is one of the complexing media used for the
precipitation of ferrous oxalate dihydrate. An inexpensive method using starch for preparation
of acicular particles is described. The influence of an additive namely Gd on acicularity is also
investigated
Description:
Bull. Mater. Sci., Vol. 20, No. 7, October 1997, pp. 975 980