Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Reexamination Certificate
2007-06-26
2007-06-26
Kiliman, Leszek (Department: 1773)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
C428S403000, C428S404000, C428S405000, C428S406000
Reexamination Certificate
active
10522778
ABSTRACT:
Pyrogenically prepared, doped zinc oxide powder, wherein the doping component comprises at least one oxide from the group aluminum, gallium, indium, germanium, tin and is present in the doped zinc oxide powder in an amount of from 0.005 to 15 wt. %, and wherein the doped zinc oxide powder is in the form of aggregates of primary particles having a mean maximum diameter of from 30 to 400 nm. It is prepared by oxidation from zinc powder and at least one doping agent, wherein the process zones vaporisation, nucleation, oxidation and quenching are passed through and the doping agent is metered in in the nucleation zone, in which the temperature is below the boiling temperature of zinc. The doped zinc oxide powder can be used in electrically conductive lacquers and coatings.
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patent: 03 080515 (2003-10-01), None
Funahashi, Tsuneo. et al. “Manufacture of Zinc Oxide Fine Particles with Large Specific Surface Area”, Chemical Abstracts+Indexes, vol. 109, No. 22, p. 167, XP000019653 1988.
Gutsch Andreas
Katusic Stipan
Kress Peter
Michael Guenther
Varga Geoffrey J.
Degussa - AG
Kiliman Leszek
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