Polyvinyl alcohol evaporation method for preparation of submicron chromite powders

Authors: Adak, A.K.; Pathak, A.; Pramanik, P.

Source: British Ceramic Transactions, Volume 98, Number 4, April 1999 , pp. 200-203(4)

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Abstract:

Fine particles of chromites (MO . Cr₂O₃ where M = Mg, Zn, Ni, Co, and Cu) have been prepared by calcination of precursor powders prepared by evaporation of an aqueous solution of polyvinyl alcohol and stoichiometric amounts of the desired metal nitrates in appropriate mole ratios. The calcination temperatures, for the various chromite precursors, ranged from 350 to 450°C. The formation of the respective pure chromite phase in the calcined powders has been inferred from X-ray diffraction and infrared spectroscopy studies. The powders were found to be compositionally homogeneous and the average particle sizes, measured using transmission electron microscopy, were found to lie in the range 100–200 Å.

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1179/096797899680453

Affiliations: the Indian Institute of Technology, Department of Chemistry, Kharagpur, – 721 302, West Bengal, India

Publication date: 1999-04-01

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