Title:
NICKEL SUPERFINE POWDER FOR MULTILAYER CERAMIC CAPACITOR
Document Type and Number:
Japanese Patent JP3197454
Kind Code:
B2
Abstract:
PURPOSE: To obtain a nickel powder as a low-resistance electrode material which is hardly cracked or released in the process for producing a ceramic capacitor.
CONSTITUTION: This nickel superfine powder for a multilayer ceramic capacitor has 0.1-1.0μm average grain diameter and has a tap density satisfying the conditions expressed by expression 1. The geometrical standard deviation of the grain size is preferably controlled to ≤2.0 and the average crystallite diameter to ≥0.2 times the average grain diameter. The nickel superfine powder is more preferably produced by hydrogen reduction in the phase of nickel chloride vapor. In this case, tap density ≥-2.5 × (average grain diameter)3 + 7.0 × (average grain diameter) + 0.6 as shown in expression 1.
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Inventors:
Hiroyuki Ishikawa
Kenichi Ohtsuka
Shuetsu Ogasawara
Hisao Hamada
Kenichi Ohtsuka
Shuetsu Ogasawara
Hisao Hamada
Application Number:
JP5090595A
Publication Date:
August 13, 2001
Filing Date:
March 10, 1995
Export Citation:
Assignee:
Kawasaki Steel Co., Ltd.
Kawatetsu Mining Co., Ltd.
Kawatetsu Mining Co., Ltd.
International Classes:
B22F1/05; C22C19/03; H01B1/22; B22F9/28; H01G4/12; (IPC1-7): B22F1/00; B22F9/28
Domestic Patent References:
| JP4365806A | ||||
| JP4235201A |
Other References:
「新材料１９９４」東レリサーチセンター調査研究部門編（平成６年１月）ｐ．２６４−２６５
「第３回新素材交流会議講演集」日本鉱業協会（平成６年７月）ｐ．７−１３
「第３回新素材交流会議講演集」日本鉱業協会（平成６年７月）ｐ．７−１３
Attorney, Agent or Firm:
Eiichi Kobayashi