气液接触法制备球形氢氧化镁(英文)

Spherical Magnesium Hydroxide Prepared by Gas-Liquid Contact Method

利用气液接触法成功合成出了形状规则的球形氢氧化镁,并用X射线衍射仪(XRD)、热重(TG-DTG)、扫描电镜(SEM)和激光粒度仪表征了所得产品的结构、形貌、及粒度分布等性质。结果显示:所得球形氢氧化镁颗粒分散性较好,样品的表观粒径D50=7.41μm,热分解温度始于363.6℃。最后根据气液接触反应的原理及氨气易挥发和被吸收的性质,对球形氢氧化镁的形成机理进行了讨论。

A regularly shaped spherical magnesium hydroxide was synthesized through gas-liquid contact method. The structure, morphology, size distribution, and other characteristics of the spherical magnesium hydroxide were characterized by X-ray diffraction, thermogravimetry-derivative thermogravimetry, scanning electron microscopy, and laser particle analysis. Results reveal that the synthesized spherical magnesium hydroxide has good particle dispersion, a particle diameter of D50=7.41 μm and a thermal decomposition temperature above 363.6 ℃. The formation mechanism of the spherical magnesium hydroxide was discussed according to the principle of gas-liquid contact reaction, and the high volatility and easy absorbability characteristics of ammonia.