气液接触法制备球形氢氧化镁(英文)  

Spherical Magnesium Hydroxide Prepared by Gas-Liquid Contact Method

作　　者：刘志启[1] 李丽娟[1] 张东生[2] 姬连敏[1] 陈运法[1,3] 王念贻 

机构地区：[1]中国科学院青海盐湖研究所,西宁810008 [2]西安电子科技大学,西安710126 [3]中国科学院过程工程研究所,北京100190

出　　处：《无机化学学报》2014年第3期705-709,共5页Chinese Journal of Inorganic Chemistry

基　　金：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

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=7.41μm,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.

关 键 词：氢氧化镁 球形 晶体生长 扩散法 

分 类 号：O614.22[理学—无机化学]