Abstract
The preparation of powder plays an important role in the manufacture of sintered ferrites. The characteristics of the ferrite powders are influenced by method of preparation which subsequently influence the properties of finished products. Various chemical methods such as conventional coprecipitation, spray drying, pyrogel flame reactor, freeze drying, liquid drying, and pyrolysis of organic precursors suitable for preparing ferrite powders from aqueous salt solutions have been described. The high degree of homogeneity, precise chemical composition and controlled particle size of ferrite powders prepared by these methods are found to be highly desirable for achieving good quality products with improved properties. The selection of a suitable chemical method of powder preparation in relation to the traditional practice of milling along with modern manufacturing methods will be helpful towards improving the quality of our industrial products which are now produced by the conventional ceramic processing.
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