| 气液接触法制备球形氢氧化镁 | |
| Spherical Magnesium Hydroxide Prepared by Gas-Liquid Contact Method | |
| 摘要: 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=7.41 μm，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。 | |
| 关键词: 氢氧化镁 球形 晶体生长 扩散法 | |
| 基金项目: 国家科技支撑计划(No.2009BAE83B02)、青海省科技厅(No.2010-G-221A)、西部之光(No.2010-1)、博士后项目(No.118918)资助。 | |
| Abstract: 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. | |
| Keywords: magnesium hydroxide spherical crystal growth diffusion | |
| 投稿时间：2013-08-20 修订日期：2013-11-08 | |
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| 刘志启,李丽娟,张东生,姬连敏,陈运法,王念贻.气液接触法制备球形氢氧化镁[J].无机化学学报,2014,30(3):705-709. | |
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