摘要
研究了晶型碳酸镧铈的制备,并以其为前驱体,分别加入氟化钠和氢氟酸两种氟化物制备抛光粉。通过XRD、SEM、粒度分布、振实密度、切削力及其对玻璃的抛光性能等实验的表征得出如下结果:氟化钠的加入改变了颗粒形貌,形成椭球型颗粒,但氟化钠未能改变抛光粉的物质结构;氢氟酸使得粉末颗粒细化,密度提高,一致性好,并改变了物质结构,析出了四方结构的氟氧化镧(LaOF)。两种氟化物的加入均提高了抛光粉的切削率,但掺入氢氟酸制备的抛光粉抛光效果更好。
The synthesis of crystalline lanthanum carbonate as precursor,and the preparation polishing powder by adding sodium fluoride and hydrofluoric respectively was studied.The experimental characterizations of XRD,SEM,particle size distribution,tap density,cutting force,and polishing performance of the glass revealed that the addition of sodium fluoride made the morphology of the particles ellipsoidal, but the material structure of the polishing powder was no change.However,the addition of hydrofluoric acid not only made the particles fine and uniform, but also changed the structure of the material and precipitates the LaOF of the tetragonal structure,as well as the tap density was also improved. Simultaneously,the addition of two fluorides could increase the cutting rate of the polishing powder,but the polishing powder prepared by doping with hydrofluoric acid had a better effect.
引文
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