Title:
CERAMIC SINTERED BODY AND MOLD MADE OF CERAMICS
Document Type and Number:
Japanese Patent JP3541108
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce a sintered body excellent in electric discharge machining property by incorporating insulating ceramic particles having a specified grain size and a conductive ceramic powder having a prescribed average grain size.
SOLUTION: About 75-40vol.% insulating ceramic particles having ≤10μ grain size when a cumulative frequency of 1.5-6mol% Y2O3 partially stabilized ZrO2, etc., may be 90%, 25-60vol.% conductive ceramic powder such as TiN and having ≤10μm grain size and a wax based binder are dispersed in a solvent such as water, and subjected to a wet mixing to prepare slurry. This slurry is subjected to spray drying, and the obtained granulated powder is calcined at about 800-1700°C for 1-3hr in the atmosphere. Then the calcined powder is subjected to pressure compacting, and the compact is burned under pressure at about 1450-1650°C to obtain a ZrO2-TiN composite material sintered body. This sintered body is subjected to wire cut electric discharge machining to obtain the mold having a planar smoothness, long in service life, hardly causing any damage and color migration of a work.
Inventors:
Keiji Suzuki
Takayoshi Morishita
Yogo Tetsuji
Takayoshi Morishita
Yogo Tetsuji
Application Number:
JP28883896A
Publication Date:
July 07, 2004
Filing Date:
October 30, 1996
Export Citation:
Assignee:
Nippon Special Ceramics Co., Ltd.
International Classes:
B21D37/01; B23H9/00; C04B35/00; C04B35/10; C04B35/119; C04B35/48; C04B35/488; C04B35/56; C04B35/58; H01B1/14; H01B1/18; (IPC1-7): C04B35/00; B21D37/01; C04B35/10; C04B35/48
Domestic Patent References:
| JP5294716A | ||||
| JP5194025A |
Attorney, Agent or Firm:
Naoki Fukumura
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