Title:
【発明の名称】イリジウム焼結体の製造方法
Document Type and Number:
Japanese Patent JP2902060
Kind Code:
B2
Abstract:
PURPOSE:To manufacture an iridium sintered body having no surface contamination, low surface roughness, smooth surface condition and high sintered density by executing heat treatment to the iridium powder, compacting with a metallic mold, executing the sintering after executing the specific pre-burning to this and further, recompacting with the metallic mold. CONSTITUTION:The iridium powder chemically precipitated and deposited, is treated in the temp. range of 400-800 deg.C under H2 gas stream to remove adsorbed material. This treated iridium powder is compacted with the metallic mold at 0.5-5ton/cm<2> pressure. The sintering is executed to this green compact after executing the pre-burning under H2 or vacuum condition at 800-1400 deg.C. The adsorbed material is perfectly removed with this pre-burning and also involved gas at the time of compacting, is removed. Further, this sintered body is recompressed by using the metallic mold setting clearance to 0.02-0.3mm with this sintered body. By this method, the surface roughness on the sintered body is made to little.
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Inventors:
SAKAIRI KOICHI
Application Number:
JP16527690A
Publication Date:
June 07, 1999
Filing Date:
June 22, 1990
Export Citation:
Assignee:
TANAKA KIKINZOKU KOGYO KK
International Classes:
B22F3/10; B22F3/24; B22F5/00; C22C1/04; B22F1/00; (IPC1-7): B22F3/10; B22F1/00; B22F3/24; C22C1/04
Domestic Patent References:
| JP5716102A | ||||
| JP4423610B1 | ||||
| JP292604B1 |