Title:
ニッケル基超微粉及びその製造方法
Document Type and Number:
Japanese Patent JP4409989
Kind Code:
B2
Abstract:
In order to reduce the size of a laminated ceramic capacitor by reducing the thickness of a dielectric material, to increase the number of laminated dielectric layers and electrodes, and to elevate the capacity, the quantity of coarse particles of which particle diameters exceed 1 mupm is reduced from the metal powder used in the internal electrodes. There is provided a nickel-based ultra-fine powder, wherein the average particle diameter of primary particles is 0.05 to 0.3 mum, the number of the primary particles that have a particle diameter of 1 mum or larger is 50 ppm or less relative to the total number of the particles, and the number of the primary particles that have a particle diameter of 0.6 times or smaller than the average particle diameter is 10% or less relative to the total number of the particles. The nickel-based ultra-fine powder is produced from nickel chloride vapor or the like using a vapor-phase hydrogen reduction method.
Inventors:
Hiroshi Yamane
Keiichi Yoshioka
Keiichi Yoshioka
Application Number:
JP2004051818A
Publication Date:
February 03, 2010
Filing Date:
February 26, 2004
Export Citation:
Assignee:
JFE Mineral Co., Ltd.
International Classes:
B22F9/12; B22F1/00; B22F1/052; B22F9/28; H01G4/008; H01G4/012; H01G4/12; H01G4/30
Domestic Patent References:
| JP2001247903A | ||||
| JP2001316701A | ||||
| JP8246001A | ||||
| JP11189801A | ||||
| JP6073401A |
Foreign References:
| WO2001015838A1 |
Attorney, Agent or Firm:
Yoshio Kosugi
Masaki Yamada
Masaki Yamada