| 摘要 |
PROBLEM TO BE SOLVED: To provide a high density material which has a density of≥18.6 g/cm<SP>3</SP>, and to provide a low-cost production method therefor in which a sintering temperature is≤1,500°C, and pressurization working is not required after sintering. SOLUTION: By weight,≥98 wt.% tungsten powder, the powder of two or three kinds of metals selected from Ni, Co and Fe by≥0.1%, respectively, and by 0.2 to 1.8% in total, the powder of one or more kinds of metals selected from Cu and Al by 0.1 to 1.5% in total, and an organic binder are mixed in a mixer, and the powdery mixture is compacted, is thereafter degreased, and is sintering at≤1,500°C in an H<SB>2</SB>atmosphere to obtain the high density material. The material having denseness and high density can be obtained at a temperature lower than that in the conventional case by using the method for producing the high density material. Further, operating properties more satisfactory than those of the conventional material and free from deterioration can be obtained when the high density material is used for the oscillator of a portable telephone, the weight means of a self-winding watch and a self-winding power generation mechanism, a radiation shielding material or the like. COPYRIGHT: (C)2004,JPO
|
