Fluorine-containing magnesium oxide powder prepared by vapor...

Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing

Reexamination Certificate

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C423S497000, C423S635000

Reexamination Certificate

active

07972586

ABSTRACT:
The present invention relates to a fluorine-containing magnesium oxide powder using a vapor phase reaction and a method of preparing the same and more particularly to a fluorine-containing magnesium oxide powder brings about a cathode-luminescence emission having a peak within a wavelength range of 220 to 320 nm upon being excited by electron beams. The present invention provides a fluorine-containing magnesium oxide powder using a vapor phase reaction that sprays fluorine-containing gas and oxygen-containing gas to magnesium vapor, and the purity of magnesium oxide containing fluorine (i.e. the purity of fluorine-containing magnesium oxide) of 0.001 to 2 wt % is at least 98 wt % and a BET specific surface area thereof is 0.1 to 50 m2/g.

REFERENCES:
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patent: 4786490 (1988-11-01), Yoshida et al.
patent: 5910297 (1999-06-01), Cicha et al.
patent: 2004-182521 (2004-07-01), None
patent: 102000006661 (2000-02-01), None
patent: 1020000048076 (2000-07-01), None
patent: 10-2007-0083428 (2007-08-01), None
Machine Translation of KR2007-0083428, Feb. 21, 2007.
Tamai et al., “Enhanced Dichlorodifluoromethane Decomposition with Selective Fluorine Absorption by Acidic Fluorinated Magnesium Oxide”, Bull. Chem. Soc. Jpn., 77, 1239-1247 (2004).
International Search Report issued Mar. 25,2009 in PCT/KR2008/005481.
Written Opinion issued Mar. 25,2009 in PCT/KR2008/005481.

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