文献类型：期刊文献

英文题名：Rheological behavior of aciculate ultrafine α-FeOOH particles under alkaline conditions

作者：Li, CZ; Cai, SY; Fang, TA

机构：[1]E China Univ Sci & Technol, Inst Tech Chem & Phys, Shanghai 200237, Peoples R China

年份：1998

卷号：141

期号：1

起止页码：94

外文期刊名：JOURNAL OF SOLID STATE CHEMISTRY

收录：;EI(收录号：2004057860301);WOS:【SCI-EXPANDED(收录号:WOS:000077462100011)】；

语种：英文

摘要：The three-phase oxidation of ferrous hydroxide slurry can produce goethite (alpha-FeOOH) iron oxide particles suitable for use in magnetic recording media. Experimental studies show that the reaction slurries were Newtonian liquids with a viscosities lower than 0.005 Pa.s at the beginning of the oxidation reaction. The reactive slurries displayed strong shear-thinning behavior, which can be fitted to a power law equation at the middle and later stages of reaction, and these slurries showed no thixotropy but showed a yield stress at quietus, The rheological behavior of the reaction slurries was mainly caused by the formation mechanism of alpha-FeOOH particles and by the morphology change of the solid particles. The rheological behavior was strongly affected by dopants such as MnSO4, MgSO4, and Na2SiO3, The apparent reaction rate was controlled by the oxygen mass transfer rate, which was strongly affected by the rheological behavior of the reactive slurries. (C) 1998 Academic Press.