Method preparing superfine metallic nickel powder with high frequency plasma

A technology of high-frequency plasma and metal nickel powder, which is applied in the field of preparation of fine spherical nickel powder, which can solve the problems of rough particle surface, unsuitability for preparing conductive paste, and small tap density, so as to avoid toxic and harmful products, disperse Good performance and uniform particle size distribution

Inactive Publication Date: 2010-09-22
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the surface of the nickel powder prepared by the liquid phase reduction method is rich in hydroxyl groups, and the surface of the particles is not smooth.
In addition, compared with the gas phase method, the tap density of nickel powder products with the same particle size obtained by the liquid phase reduction method is much smaller, so this type of nickel powder is not suitable for the preparation of conductive paste

Method used

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  • Method preparing superfine metallic nickel powder with high frequency plasma
  • Method preparing superfine metallic nickel powder with high frequency plasma
  • Method preparing superfine metallic nickel powder with high frequency plasma

Examples

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example 1

[0017] Nickel hydroxide is used as raw material to carry out high-frequency plasma hydrogenation reduction to prepare metal nickel powder. The flow rate of carrier gas hydrogen is 1.0m 3 / h, the feeding amount is 15g / min, the system negative pressure is 100mm water column, and the central argon gas flow rate is 2.0m 3 / h, side gas nitrogen flow rate 4.0m 3 / h, the flow rate of cooling gas nitrogen is 10.0m 3 / h. figure 2 is the XRD spectrum of the product. image 3 It is the scanning electron micrograph and particle size distribution of the product nickel powder.

example 2

[0019] Nickel hydroxide is used as raw material to carry out high-frequency plasma hydrogenation reduction to prepare metal nickel powder. The flow rate of carrier gas hydrogen is 1.0m 3 / h, the feeding amount is 15g / min, the system negative pressure is 100mm water column, and the central argon gas flow rate is 2.0m 3 / h, side gas nitrogen flow rate 4.0m 3 / h, without cooling air.

example 3

[0021] Metal nickel powder was prepared by plasma hydrogenation reduction using basic nickel carbonate as raw material. The flow rate of carrier gas hydrogen is 1.0m 3 / h, the feeding amount is 20g / min, the system negative pressure is 100mm water column, and the central argon gas flow rate is 2.0m 3 / h, side gas nitrogen flow rate 4.0m 3 / h, without cooling air.

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Abstract

The invention relates to a method preparing spherical metallic nickel powder with high frequency plasma. The method takes the hydrate of metallic nickel or subcarbonate as raw material and carries out hydrogen reduction through the high frequency plasma technology to prepare the superfine spherical nickel powder. Plasma arc is added to the raw material. The plasma is heated in high temperature through high frequency induction and generates reduction reaction with high-activity hydrogen plasma. The superfine spherical nickel powder can be obtained through a shape controller in the condensation process. The utility model is characterized in that the nickel hydroxide or the subcarbonate are used as the raw material, in the reduction process of the plasma, the particle size and the shape of the nickel powder can be controlled easily, the process flow is short and the production process is environment-friendly.

Description

technical field [0001] The invention relates to a method for preparing fine spherical nickel powder by using nickel hydroxide or basic nickel carbonate as a raw material and adopting a hydrogen plasma reduction method. The nickel powder prepared by the method is suitable for the fields of conductive paste, powder metallurgy and the like. technical background [0002] Fine nickel powder shows a series of unique physical and chemical properties in terms of magnetism, internal pressure, thermal resistance, light absorption, chemical activity, etc., and is widely used in magnetic materials, catalysts, battery materials, surface coating materials, cemented carbide bonding It is an important basic industrial raw material. Especially with the base metallization process and miniaturization development trend of electrode materials in multilayer ceramic capacitors, the demand for fine spherical nickel powder will increase. Therefore, it is very important and urgent to seek a practica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22
Inventor 袁方利白柳杨胡鹏李晋林范俊梅黄淑兰
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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