摘要
以四钼酸铵和氨水为原料,通过反应-蒸发-结晶的联合操作过程制备了高分散、大粒径的二钼酸铵单晶。采用X射线衍射仪、傅里叶变换红外光谱仪、透反射光学显微镜对所得样品的物相结构和形貌进行了表征。借助TG-DSC综合热分析推断了二钼酸铵的热分解历程。同时,应用Malvem激光粒度分析仪对样品的费氏粒度、粒度分布和表观密度进行了测定。结果表明:所得样品为单晶态二钼酸铵,呈非团聚态,表面光亮,棱角分明,颗粒均匀,其费氏粒度为433.316μm,d(0.5)为470.981μm,表观密度为1.592 g/cm3。
Non-agglomerated ammonium dimolybdate （ADM } monocrystals with large diameter and high dispersion were prepared through reaction-evaporation-crystallization united process using ammonium tetramolybdate and ammonia solution as starting reactants. Structure and morphology of the prepared ADM samples were characterized by X - ray powder diffraction, Fourier transform infrared spectroscopy, and transmission-reflection optical microscope. The thermal decomposition process of ammonium dimolybdate was deduced by TG - DSC thermal analysis, and Fisher particle size, size distribution, and loose packed density were tested by Malvern dry powder laser particle sizer. It is shown that the prepared ADM samples were non-agglomerated monocrystals with well grain normal distribution and geometric shape, and the Fisher particle size, d（0. 5 ）, and loose packed density were 433. 316 μm ,470. 981 μm,and 1. 592 g/cm3 ,respectively.
出处
《无机盐工业》
CAS
北大核心
2012年第1期16-18,共3页
Inorganic Chemicals Industry
基金
国家自然科学基金项目(21076063)
河南省科技攻关项目(102102210170)
洛阳市矿产资源化工重点实验室建设项目(1003016A)
关键词
二钼酸铵
单晶
四钼酸铵
ammonium dimolybdate
monocrystal
ammonium tetramolybdate
