氢氧化镁的水热改性研究  

Hydrothermal Modification Research of Mg(OH)_2

作　　者：张林进[1] 张月琴[1] 叶旭初[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《盐业与化工》2009年第2期24-27,共4页Jounral of Salt and Chemical Industry

摘　　要：对常温合成的氢氧化镁进行了水热改性研究,考察了水热改性温度、改性时间及搅拌转速等因素对水热产物的影响。与常温产物相比,经水热改性处理后,颗粒由不规则的团聚体转化为规则的六方片状结构,改性温度的提高能够促进小颗粒形成的团聚体的溶解,并在大颗粒表面上生长,改善晶体结晶性能。随着改性时间的延长,极性较弱的(001)晶面显露较多,而极性较强的(101)面受到一定的抑制,特征衍射峰I(001)/I(101)比值明显增大,说明水热处理改变了氢氧化镁的生长习性,生成了分散性良好的氢氧化镁颗粒。Hydrothermal modification of Mg （OH）2 synthesized at room temperature was studied in the paper. The effects of modification temperature, time and impeller speed on the hydrothermal products were investigated. Compared with Mg（OH） 2 particles synthesized at room temperature, the regular hexagonal plates changed from irregular aggregates formed after the hydrothermal treatment. The increase of modification temperature can make the aggregates composed of smaller particles to dissolve and grow on the surface of larger particles, and the crystal strueture beeame more stable. The dispersion properties of the hydrothermal products were improved with the prolongation of hydrothermal time, resulting in the increase of I（001）/I（101）, which indicated that hydrothermal treatment changed the growth direaetion of Mg（ OH）2 crystal.

关 键 词：水热改性 氢氧化镁 形貌 结构 

分 类 号：TQ132.2[化学工程—无机化工]