Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2006-12-12
2006-12-12
Vanoy, Timothy C. (Department: 1754)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S594160, C423S263000, C423S069000, C423S021100, C423S155000, C361S321100, C361S321200, C361S321300, C361S321400, C361S321500, C501S136000, C501S137000, C501S138000, C501S139000
Reexamination Certificate
active
07147835
ABSTRACT:
Disclosed herein is a small particle oxide powder for dielectrics. The oxide powder has a perovskite structure, an average particle diameter [D50(μm)] of 0.3 μm or less, a particle size distribution of the average particle diameter within 3%, a particle size distribution satisfying a condition D99/D50<2.5, a content of OH−groups of 0.2 wt % and a C/A axial ratio of 1.006 or more. A method of manufacturing the oxide powder comprises the steps of mixing TiO2particles and a compound solved with at least one element represented by A of the perovskite structure of ABO3; drying and pulverizing the mixture of TiO2and the compound; calcining the pulverized mixture; adding the oxide containing the elements of the site A to the coated TiO2particles and wet-mixing, drying and pulverizing; primarily calcining and pulverizing the pulverized powder under vacuum; and secondarily calcining and pulverizing the powder.
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Hur Kang Heon
Kang Sung Hyung
Ryu Jin Yung
Seo Dong Hwan
Lowe Hauptman & Berner LLP.
Samsung Electro-Mechanics Co. Ltd.
Vanoy Timothy C.
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