Anantharaman, M R; Seshan, K; Chakrabarty, D K; Keer, H V(Springer, February 20, 1981)
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Abstract:
Acicular FeC~O4-2H20 was precipitated from glycerol and starch
media. Thermal decomposition of this oxalate in dry and moist nitrogen yielded
primarily FeO and Fe 3Oa respectively. Characterization was attempted through
DTA, TG, x-ray diffraction, TEM and magnetization studies. It was found
that the oxalate can be completely decomposed to FeaO~ in moist nitrogen
(PH~o ,"-" 35 torr) at 775 K and then oxidised by dry air to acicular "/-Fe~Oa at
575 K. The resulting material has saturation magnetization (,-,., 70 emu/g),
coercive field (N300 Oe) and squareness ratio ( ,~, 0-60-0-65), which values art
comparable with those of the commercial samples
Description:
Bull. Mater. Sci,, Vol, 3, Number 3, November 1981, pp. 275-280.