| US 7,473,408 B2 | ||
| Method for preparing single crystalline cerium oxide powders | ||
| Jun-Seok Noh, Daejeon (Korea, Republic of); Tae-Hyun Kwon, Daejeon (Korea, Republic of); Seung-Beom Cho, Daejeon (Korea, Republic of); Hye-Jeong Hong, Daejeon (Korea, Republic of); and Dae-Gon Han, Daejeon (Korea, Republic of) | ||
| Assigned to LG Chem, Ltd., (Korea, Republic of) | ||
| Appl. No. 10/482,625 PCT Filed Apr. 14, 2003, PCT No. PCT/KR03/00756 § 371(c)(1), (2), (4) Date Dec. 30, 2003, PCT Pub. No. WO03/089374, PCT Pub. Date Oct. 30, 2003. |
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| Claims priority of application No. 10-2002-0020407 (KR), filed on Apr. 15, 2002. | ||
| Prior Publication US 2004/0241070 A1, Dec. 02, 2004 | ||
| Int. Cl. C01F 17/00 (2006.01) | ||
| U.S. Cl. 423—263 [502/304] | 7 Claims |
| 1. A method for preparing single crystalline cerium oxide (CeO2) nanopowder, comprising:
preparing a cerium salt solution by dissolving a cerium salt into a solvent mixture consisting of organic solvent and water
in a ratio of about 0.5:1 by weight to about 5:1 by weight;
precipitating a cerium hydroxide from the cerium salt solution under alkali condition by addition of a pH adjuster selected
from the group consisting of NaOH, and KOH; and
hydrothermally reacting said cerium hydroxide;
wherein said organic solvent consists of one or more compounds selected from the group consisting of an alcoholic organic
solvent, a glycolic organic solvent, acetone, glycerol, formic acid, and ethyl acetate.
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