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稀土拋光粉

稀土拋光粉

稀土拋光粉(rare earth polishing powder)是指以氧化鈰為主要成分的混合輕稀土氧化物粉末,以提高產品或零件的表面光潔度。通常以氟碳鈰礦精礦(含RE2O3≥70%)或可溶性稀土鹽(含CeO2/RE2O3=45%~50%氯化稀土或CeO2>80%富鈰稀土化合物)為原料,經化學工藝制成處理、燃燒、粉碎、篩分等工序。

稀土拋光粉的拋光能力與氧化鈰的含量和拋光粉的粘度、化學活性等物理化學性質密切相關。一般氧化鈰含量高的稀土拋光粉拋光能力強,但高鈰稀土拋光粉價格昂貴,普遍采用低鈰稀土拋光粉。在制備稀土拋光粉的過程中,通常加入含氟和硫酸鹽的添加劑,生成氟化物和硫酸鹽。含有氟化物和硫酸鹽的稀土拋光粉一般具有良好的拋光性能。

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