Preparation of magnesium hydroxide nanoplates using a bubbling setup

• Published in: Powder technology Vol. 198; no. 2; pp. 292 - 297
• Main Authors: Li, Xue, Ma, Chao, Zhao, Junyong, Li, Zhitao, Xu, Shengbo, Liu, Yunyi
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 10.03.2010; Elsevier
• Subjects: Alkaline air; Applied sciences; Bubbling; Bubbling setup; Chemical engineering; Exact sciences and technology; Flame retardant; Magnesium; Magnesium hydroxide; Magnesium oxide; Miscellaneous; Nanocomposites; Nanomaterials; Nanostructure; Particle size; Solid-solid systems; Flame retardant; Magnesium hydroxide; Bubbling setup; Alkaline air; Scanning electron microscopy; Particle size; Differential thermal analysis; Surfactant; Dispersion; Calcining; Bubbling; Design; Morphology; Preparation; Laser; pH; Nitrogen fertilizer
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/j.powtec.2009.11.024

Magnesium hydroxide [MH] with hexagonal nanoplates were synthesized from lightly calcined magnesia (MgO), nitrogen fertilizer ((NH 4) 2SO 4) and alkaline air (NH 3), using a large bubbling setup designed by the authors. The effects of various reaction conditions, including the addition of surfactant, magnesium source, concentration of ions, and initial pH of reaction solution on the morphology, particle sizes, and dispersion properties of the synthesis products were investigated. XRD, SEM, laser particle size analyzer and TG-DTA have been employed to characterize these products. The experimental results showed that the regular-shaped MH products were about 2 μm in mean particle size (D50) and nanometers in thickness, and were loose enough for filtering. The diffraction intensity of the (001) direction was higher than that of the (101) direction. The Mg 2+ conversion in the continuous setup reached 71% and the decomposition temperature of products was 404 °C. We have submitted a paper entitled “Preparation of Magnesium Hydroxide Nanoplates Using a Bubbling Setup” (by Xue Li a, , Chao Ma a, Junyong Zhao a, Zhitao Li b, Shengbo Xu b, Yunyi Liu a) to be considered for publication in “Powder Technology” as a full paper. ( a College of Chemical Engineering, Shenyang Institute of Chemical Technology, Shenyang 110142, PR China). [Display omitted]