材料期刊网

以氯化镧铈为原料,碳酸氢铵为沉淀剂,氟化铵为氟化剂,采用共沉淀法制备稀土抛光粉前驱体,前驱体经过高温焙烧可以得到含氟铈基抛光粉.通过改变沉淀方式、陈化温度、添加氟的量等因素对铈基抛光粉的性质进行了研究.实验结果表明,采用共沉淀法,反应温度为室温,反应时间为50 min,陈化温度80℃,陈化时间1h,掺氟量为5％时得到含氟铈基抛光粉颗粒粒度最小,D50粒径(二次粒径)为0.583μm.与其他传统生产超细抛光粉工艺相比,本方法简便易行,具有反应温度低,反应时间短,陈化时间短的优势,且与传统生产超细抛光粉工艺对比省去球磨或粉碎这一工序,可以直接得到满足客户需要的超细抛光粉,具有较高的经济效益和成本优势.

Coprecipitation method was used to prepare rare earth polishing powder precursor by using (LaCe) Cl3 as the raw materials,NH4HCO3 as the precipitant and NH4F as a fluidizer.The ultrafine fluorine-containing and ceria-based polishing powder can be obtained by roasting the precursor at high-temperature.The precipitation methods,aging temperature and the fluorine content are the key factors that influence the polishing powder properties.The results show that the particle size of polishing powder is minimum (D5o =0.583 μ m) by applying the coprecipitation method reacted at room temperature for 50min and aged at 80 ℃ for 1 h and aging with 5％ F-adding.Comparing with the traditional ultrafine polishing powder producing process,this technology has the advantages of simpler process,lower reaction temperature,shorter reaction and aging time in production and the advantages of lower cost and higher profits concerning markets.It can directly produce superfine polishing powder to meet the customers' requirements without ball milling or pulverization.