Ceria based glass polishing composition and a process for...

Details Ceria based glass polishing composition and a process for... Ceria based glass polishing composition and a process for...

2011-04-19

2011-04-19

Wood, Elizabeth D (Department: 1732)

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

C423S021100, C423S299000, C423S300000, C423S301000, C423S304000, C423S305000, C423S467000, C423S511000, C423S512100, C423S263000

Reexamination Certificate

active

07927391

ABSTRACT:
The invention is directed to a process for the manufacture of a ceria based polishing composition, comprising (a) suspending an inorganic cerium salt or cerium hydroxide with a cerium content calculated as cerium oxide in the range of 50%-100% based on Total rare earth oxide (TREO) in an aqueous medium thereby obtaining an aqueous suspension, (b) treating said aqueous suspension with an acid or a salt of an acid selected from the group of HF, H3PO4and H2SO4, thereby obtaining a solid suspended in said aqueous medium, (c) separating said solid from said aqueous medium, and (d) calcining the separated solid at a temperature between 750° C. and 1,200° C. and grinding the calcined solid to grain sizes in the range of 0.5 μm to 5.0 μm.

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Li, Liangcai: Database CA [Online] Chemical Abstracts Service, Columbus, Ohio, US; “Manufacture of white ceric oxide” XP002402540.

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