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Technological method for preparing high purity nanometer grade powder

A process method and nano-level technology, applied in the field of powder metallurgy process, can solve the problems of long process, difficult to ensure consistent raw materials, and high raw material cost

Inactive Publication Date: 2007-02-14
上海伟良企业发展有限公司
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Problems solved by technology

Due to the adoption of the above scheme, it is not difficult to draw the following conclusions: the invention has an ingenious conception, which solves the problems in the prior art that the entire process is long, the raw materials are difficult to ensure consistency, and the cost of raw materials is extremely high.

Method used

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  • Technological method for preparing high purity nanometer grade powder

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Embodiment Construction

[0009] In the figure, the boat structure: 6 support points 11 are set on the middle and upper parts of both sides of the upper boat 10; 6 support points 21 are also set on the middle and upper parts of the two sides of the middle boat 20 corresponding to the support points of the upper boat, corresponding to the support points. 6 positioning support points 22 are set on the frame surface of the boat (for supporting and limiting and fixing the upper boat); on the frame surface of the lower boat 30, corresponding to the position of the support point of the middle boat, 6 support points 31 are set (for supporting and limit the middle boat), and the bottom is provided with two arc-shaped sliding ribs parallel to the sides (used for the load-bearing of the whole boat and the work sliding in the multi-tube furnace); the whole boat is made of Cr30Ni10 main material + additives, high temperature precision It is cast; the weight distribution of the three-layer boat is - upper layer: mid...

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Abstract

The technological process of preparing high purity nanometer level powder features that three-layer laminated boat with filled material is made to enter to the head of the multiple tube furnace, pass through the reduction area and discharge from the tail after cooling while hydrogen is made to enter to the furnace from the tail, react to the material in the reduction area and discharge through the head of the furnace to the hydrogen treating device. The present invention has specially designed three-layer laminated boat and controlled material thickness in the boat, and has been used in producing high purity tungsten powder of 30-80 nm size and with crystal form, excellent granularity distribution. Compared with available technology, the present invention has the advantage of lowered cost.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy technology. Background technique [0002] Compared with the present invention, the state of the art of the same kind closest to the present invention: the production of ultra-fine and nano-scale metal tungsten powder in the metallurgical industry generally adopts special raw material methods, such as usually using special purple tungsten or ultra-fine tungstic acid as raw materials. The original method must be premised on extremely high-cost raw materials, while the present invention uses common blue oxygen tungsten as raw material and can produce high-purity metal tungsten powder of 30-80 nanometers. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method that can effectively overcome the above-mentioned defects and produce high-quality, high-purity nano A process for preparing high-purity nano-scale powder of tungsten pow...

Claims

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Application Information

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IPC IPC(8): B22F9/22
Inventor 王辉许南彬柳拥军
Owner 上海伟良企业发展有限公司
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