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METHOD FOR PRODUCING AGGLOMERATE-FREE NANOSCALE IRON OXIDE PARTICLES WITH HYDROLYSIS-RESISTANT COATING
METHOD FOR PRODUCING AGGLOMERATE-FREE NANOSCALE IRON OXIDE PARTICLES WITH HYDROLYSIS-RESISTANT COATING
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机译:耐水解涂层的无团聚纳米氧化铁颗粒的制备方法
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摘要
A process for preparing an agglomerate-free suspension of nanosize iron-containing oxide particles coated in a stable manner comprises preparing an aqueous suspension of nanosize iron-containing oxide particles which are partially or completely in the form of agglomerates; adding a trialkoxysilane and a water-miscible polar organic solvent which has a boiling point at least 10° C. higher than the boiling point of water; treating the resulting suspension with ultrasound until at least 70% of the particles present are in the range of ±20% of the average particle diameter; removing the water by distillation under the action of ultrasound; and separating the non-disintegrated agglomerates.
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