公开(公告)号：US07927391B2

公开(公告)日：2011-04-19

申请号：US11996066

申请日：2006-07-19

Applicant: Karl Schermanz ,  Johann Schönfelder

Inventor： Karl Schermanz ,  Johann Schönfelder

IPC: C09K3/14 ,  C22B59/00

CPC classification number: C09K3/1454 ,  C01F17/0043 ,  C01P2002/50 ,  C01P2002/52 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2004/62 ,  C03C15/00 ,  C09K3/1409

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, H3PO4 and 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.

Abstract translation: 本发明涉及一种制造二氧化铈基抛光组合物的方法，该方法包括：（a）以基于总稀土的50％-100％的范围，将计算为氧化铈的铈含量的无机铈盐或氢氧化铈悬浮 （TREO），由此获得水性悬浮液，（b）用酸或选自HF，H 3 PO 4和H 2 SO 4的酸的盐处理所述水性悬浮液，从而获得悬浮于所述水性溶液中的固体 介质，（c）从所述水性介质中分离所述固体，和（d）在750℃和1200℃之间的温度下煅烧分离的固体，并将煅烧后的固体研磨至0.5μm至5.0的范围内 μm。