Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2006-10-03
2006-10-03
Vanoy, Timothy (Department: 1754)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S111000, C977S775000, C977S811000
Reexamination Certificate
active
07115243
ABSTRACT:
The present invention relates to a preparation method of α-alumina nano powder, and more particularly to a preparation method of α-alumina nano powder that has a uniform particle shape and size distribution, is capable of being produced at a low temperature, and contains less than 20 ppm of alkali metals such as Na and K. the α-alumina nano powder is prepared by glycolating aluminium alkoxide in glycol solution containing the α-iron oxide or α-alumina nucleation seed and carrying out glyco thermal reaction.
REFERENCES:
patent: H000189 (1987-01-01), Bauer
patent: 4822592 (1989-04-01), Misra
patent: 6162413 (2000-12-01), Fujiwara et al.
patent: 2005/0135995 (2005-06-01), Wang
patent: 2005/0204513 (2005-09-01), Kajihara et al.
patent: 0 522 519 (1993-01-01), None
patent: 59-3020 (1984-01-01), None
patent: 60-103024 (1985-06-01), None
patent: 60-166219 (1985-08-01), None
patent: 62-105921 (1987-05-01), None
patent: WO 98/55400 (1998-12-01), None
“High-Temperature Synthesis of Materials: Glycothermal Synthesis of Alpha Aluminum Oxide”; Authors: Nelson S. Bell, Seung-Beom Cho and James H. Adair; American Chemical Society, No. 681; 1998; pp. 120-133.
“Size Control of α-Alumina Particles Synthesized in 1, 4-Butanediol Solution by α-Alumina and α-Hematite Seeding”; Authors: Nelson S. Bell, Seung-Beom Cho and James H. Adair; Journal of American Ceramic Society, vol. 81, No. 6; Jun. 1998; pp. 1411-1420.
International Search Report; International application No. PCT/KR03/00009; International filing date: Jan. 3, 2003; Date of Mailing: Apr. 26, 2003.
Cho Seung-Beom
Han Dae-Gon
Hong Hye-Jeong
Kwon Tae-Hyun
Nho Jun-Seok
Cantor & Colburn LLP
LG Chem Ltd.
Vanoy Timothy
LandOfFree
Method for preparing α-alumina nano powder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for preparing α-alumina nano powder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing α-alumina nano powder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3655693