Method for quickly preparing precious metal parts at low temperature

A technology of precious metals and parts, which is applied in the field of rapid preparation of precious metal parts by electric field assisted sintering at low temperature, which can solve the problems of difficult molding and achieve uniform reliability, high degree of commercialization, and improved utilization.
CN102814499BActive Publication Date: 2015-04-22NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Publication Date
2015-04-22

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Abstract

The invention provides a method for quickly preparing precious metal parts at a low temperature. The method comprises the steps as follows: designing a die based on the overall dimension of a pre-formed precious metal parts; feeding the raw material which is the precious metal powder into the die; carrying out press molding at 10 to 100MPa firstly; and then transferring into an electric spark ion sintering device; heating to reach the temperature of sintering by controlling the heating rate under a vacuum or common protective atmosphere condition; and keeping the temperature for a certain time so as to obtain the formed precious metal parts. Compared with the existing preparation method of precious metal parts, the method can prepare the precious metal parts by once sintering; and by adopting the method, the sintering temperature can be greatly reduced, the preparation speed can be raised, and the obtained parts is uniform and has high density; and the method is a simple and practicable preparation method which has low cost and has commercial application value.
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Description

technical field

[0001] The invention relates to a method for preparing noble metal parts, in particular to a method for rapidly preparing noble metal parts by electric field assisted sintering at low temperature. Background technique

[0002] Precious metals are a class of metals that are less abundant in the earth's crust. They have unique electrical, thermal, and catalytic properties, so they are difficult to be replaced by other elements. At present, noble metals play an important role in the field of high-tech electronics and in the field of single crystal preparation. For example, precious metal ruthenium is an important ohmic contact material in semiconductors, and is also widely used as wiring and electrode materials for integrated circuits; precious metals such as gold and silver have good conductivity and can also be used as wiring materials and electrical contact materials.

[0003] Since precious metals are rare resources, how to make the most effective use of pr...

Claims

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