Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2007-03-15
2008-12-23
Bos, Steven (Department: 1793)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S614000, C423S612000, C423S613000
Reexamination Certificate
active
07468175
ABSTRACT:
A high photosensitivity titanium oxide composition includes a plurality of nanosize particles including titanium dioxide and titanium suboxide. The particles are substantially non-stoichiometric (TiO2-x, wherein 0.1<×<0.3 at a surface of the particles, and in the bulk of the particles x is less than at the surface), having a magnetic susceptibility value (χ) of at least 0.8·10−6cm3/g at 300 K and being at least 30% by weight rutile. A related method of forming a high photosensitivity titanium oxide composition includes the steps of providing a titanium chloride compound, such as titanium tetrachloride, an oxygen-containing gas and hydrogen, wherein a concentration of the hydrogen is in a stoichiometric excess (H2:O2) from 2.02:1 to 2.61:1. The titanium chloride compound is burned in the presence of oxygen from the oxygen-containing gas and hydrogen to form plurality of ultrafine particles comprising titanium dioxide and titanium suboxide. The method can include the steps prior to the burning step of mixing the titanium chloride compound, oxygen and hydrogen and heating the same to 50 to 100° C., such as from 70-100° C.
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Kobasa Ihor Mykhaylovych
Kovbasa Mykhaylo Andriyovych
Strus Wojciech Jan
Bos Steven
Darby & Darby PC
Worthington Technologies, LLC
Zimmer Anthony J
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