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Maghemite preparation

Mizukoshi Y, Sato K, Konno TJ, Masahashi N, Tanabe S (2008) Magnetically retrievable palladium/maghemite nanocomposite catalysts prepared by sonochemical reduction method. Chem Lett 37 922-923... [Pg.150]

Davey, P.T. Scott T.R. (1957) Preparation of maghemite by electrolysis. Nature 182 1363... [Pg.573]

The coercive force of a powder is an extrinsic property, which is influenced by many factors such as size and shape and packing density. Maghemite particles prepared from directly precipitated spindle-type hematite particles showed a tendency of increase in coercive force with decrease in particle size, and increase in their aspect ratios (31). However, a quantitative relationship between the coercive force and size and/or aspect ratio is still not available. [Pg.673]

A detailed investigation about the chemical and structural composition of maghemite (diameters in the range of 10-20 nm) based MF samples, prepared through the oxidation of magnetite nanoparticle, the latter synthesized by the coprecipitation route, was reported [53]. The precipitate containing the... [Pg.402]

Fig. 5.2. Transmission electron micrographs of maghemite > -Fe203 nanoparticles prepared by hydrolysis of Fe(lll) salts in refluxing propylene glycol in the presence of amine capping agents. The nanoparticles are soluble in toluene solutions of n-octylamine and, as a result, display a tendency for superlattice self-... Fig. 5.2. Transmission electron micrographs of maghemite > -Fe203 nanoparticles prepared by hydrolysis of Fe(lll) salts in refluxing propylene glycol in the presence of amine capping agents. The nanoparticles are soluble in toluene solutions of n-octylamine and, as a result, display a tendency for superlattice self-...
Legodi, M.A. de Waal, D. (2007). The preparation of magnetite, goethite, hematite and maghemite of pigment quality from mill scale iron waste. Dyes and Pigments, 74(1), 161-168. doi ... [Pg.13]

The optimal material for magnetic recording media was, for many years, y-FejOs (maghemite). This form of FejOj, which has a defect-spinel crystal structure, can be prepared as small, elongated particles. The coercive field is produced within the required range by shape anisotropy (see Section 4.5.1). The process used to prepare small particles of... [Pg.209]

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