稀土抛光粉的制备工艺及显色机理研究

Preparation and Color Development Mechanism of Rare Earth Polishing Powder

以碳酸稀土为原料,NH4HCO3为沉淀剂,在添加剂的作用下,采用沉淀法合成了基于CeO2的抛光粉,并采用TGA、XRD等分析手段探究了稀土抛光粉的显色机理。研究结果表明,在F-加入量为F/CeO2=6%(质量比),添加剂KCl的摩尔浓度0.75 mol/L,800℃煅烧2 h条件下,CeO2颗粒粒径分布较窄,D50=1.847μm,形态呈多面体球形,且在水中有很好的分散性;对白色稀土抛光粉颜色影响较大的杂质为Ca、Mg、Zn、Mn、P、Fe、Cu,且与化学成分、煅烧温度、煅烧时间有规律的变化,可将稀土抛光粉的色度参数引入稀土抛光粉的生产控制中。

Polishing powder based on CeO2 was synthesized by using precipitation method under the action of an additive,with rare earth carbonate as starting material and NH4HCO3 as the precipitant,and coloring mechanism of rare earth polishing powder was studied by using TGA,XRD and so on.The result showed that the mass ratio of F-to CeO26%,the molar concentration of additive KCl 0.75 mol/L,calcined at 800℃for 2 hours,the size distribution of CeO2 particles is narrow-ranged,D50 was 1.847μm,and their morphology show a shape of polyhedral globules,and they have a satisfied dispersion in water.Ca,Mg,Zn,Mn,P,Fe,Cu had a great effect on the white color of rare earth polishing powder,and the color had regular changes with chemical composition,calcining temperature,calcining time,the result can control production of rare earth polishing powder based its color.