Studies on the Formation of Magnetite Colloidal Dispersions in the Presence of Poly(vinyl alcohol)

Autor:	Hiroshi Yokoi, Kazuhiro Yagishita, Yoichiro Nakanishi
Rok vydání:	1990
Předmět:	Vinyl alcohol chemistry.chemical_compound Colloid Aqueous solution Nuclear magnetic resonance chemistry Electron diffraction Chemical engineering General Chemistry Crystal structure Absorption (chemistry) Magnetic susceptibility Magnetite
Zdroj:	Bulletin of the Chemical Society of Japan. 63:746-748
ISSN:	1348-0634 0009-2673
Popis:	The formation of magnetite in aqueous solutions containing Fe3+ and Fe2+ ions in 2:1–1:2 ratio and poly(vinyl alcohol) at room temperature has been studied by magnetic susceptibility and optical absorption measurements. It has been found that the yield reaches a maximum after allowing the solutions at pH 10.5 to stand in a sealed state for 24 h. Transmission electron micrographs for their cast films have revealed that colloidal particles with diameters of 40–100 A form either chain-like or cluster-like agglomerates. The particles have been identified as magnetite crystals by electron diffraction analysis and by direct observation of the crystal lattice structures.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7d5eeb6208f789a4a021e6315ccfdeb6 https://doi.org/10.1246/bcsj.63.746 Zobrazit plný text záznamu