Surface treatment method for superfine metal nickel powder

A metal nickel powder, surface treatment technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problem of nickel powder oxidation temperature limitation, different oxidation degrees, high energy consumption, avoid different oxidation degrees, complete oxidation reaction, The effect of high oxygen content

Inactive Publication Date: 2019-04-19
JIANGSU BOQIAN NEW MATERIALS
View PDF10 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1) Since the nickel powder is carried out under static conditions during the oxygenation process, the accumulation height of the nickel powder is different, the heating degree of the surface and the bottom of the nickel powder is different, and the contact area between the nickel powder and the oxidizing medium is different, resulting in a different degree of oxidation of the powder after oxygenation , nickel oxide content is not uniform
[0008] 2) Since the nickel powder is carried out under static conditions during the oxygenation process, the powder heating and oxygenation process is prone to powder agglomeration, sintering, conjoining, etc., and the powder dispersibility is poor
[0009] 3) Since the nickel powder is carried out under static conditions du...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surface treatment method for superfine metal nickel powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] a. The spherical submicron metal nickel powder produced by PVD method, the nickel powder particle size is 0.05 μm, is added to the reactor 1 and heated to form a liquid state, and then heated and evaporated to form nickel vapor; at the same time, the reactor is filled with nitrogen; b. . Nickel vapor rises into the condenser pipe 2, and at the same time, the gas distributor in the condenser pipe 2 is opened to fill in nitrogen. The temperature of the nickel vapor coming out of the condenser pipe 2 is 300°C; c. Nickel powder particles enter the pulse from the condenser pipe 2. Cooling chamber 3, the flow channel cross-sectional area of ​​the pulse cooling chamber 3 is 3 times the cross-sectional area of ​​the outlet of the condensation pipe 2, and the gas distributor in the pulse cooling chamber 3 is filled with air to make the oxygen content volume in the pulse cooling chamber 3 The concentration is 0.3%; the temperature inside the pulse cooling chamber 3 is 300°C, the n...

Embodiment 2

[0037] The spherical submicron metal nickel powder produced by PVD method, the nickel powder particle size is 5 μm, is added to the reactor 1 and heated to form a liquid state, and then heated and evaporated to form nickel vapor; at the same time, the reactor is filled with nitrogen; b, nickel vapor Rise into the condensation pipe 2, and at the same time open the gas distributor in the condensation pipe 2 to fill in the air, the temperature of the nickel vapor from the outlet of the condensation pipe 2 is 500 °C; c, the nickel powder particles enter the pulse cooling chamber 3 from the condensation pipe 2 , the flow channel cross-sectional area of ​​the pulse cooling chamber 3 is 5 times of the cross-sectional area of ​​the condensation pipe 2 outlets, and the gas distributor in the pulse cooling chamber 3 is filled with air, so that the oxygen content volume concentration in the pulse cooling chamber 3 is 0.3 %; The temperature in the pulse cooling chamber 3 is 500°C, the nick...

Embodiment 3

[0039] The spherical submicron metal nickel powder produced by the PVD method, the nickel powder particle size is 3 μm, is added to the reactor 1 and heated to form a liquid state, and then heated and evaporated to form nickel vapor; at the same time, the reactor is filled with nitrogen; b. Nickel vapor Rise into the condensation pipe 2, and at the same time open the gas distributor in the condensation pipe 2 to fill in the air, the temperature of the nickel vapor from the outlet of the condensation pipe 2 is 420 °C; c, the nickel powder particles enter the pulse cooling chamber 3 from the condensation pipe 2 , the flow path cross-sectional area of ​​the pulse cooling chamber 3 is 4 times of the cross-sectional area of ​​the condenser tube 2 outlets, and the gas distributor in the pulse cooling chamber 3 is filled with air so that the oxygen content volume concentration in the pulse cooling chamber 3 is 0.3 %; The temperature in the pulse cooling chamber 3 is 450° C., the nicke...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a surface treatment method for superfine metal nickel powder. The method comprises the following steps that a, submicron metal nickel powder is added into a reactor to be heated to form a liquid state, and then heating and evaporating are carried out to form nickel steam; b, the nickel steam formed in the step a rises into a condensation pipe, and meanwhile, a gas distributor in the condensation pipe is opened to be filled with nitrogen gas for cooling; c, the nickel powder particles formed in the step b enters a pulse cooling chamber from the condensation pipe, oxygenis fully contacted with the high-temperature nickel powder particles, the oxygen and the nickel powder particles are subjected to oxidation reaction to generate nickel oxide; and d, the nickel powderparticles formed in the step c enter a cooling chamber to be cooled to 80-120 DEG C, meanwhile, air exhausting is carried out on inletting air of the cooling chamber, and the nickel powder falls intoa collecting device. According to the method, an oxygen flow is controlled, meanwhile, nickel hydroxide is heated to separate the water, and the nickel hydroxide content of the nickel powder is reduced, powder is uniformly heated in the oxidation process, the oxygen content distribution is uniform, the content of nickel oxide is high.

Description

technical field [0001] The invention relates to the technical field of submicron metal powder preparation, in particular to a surface treatment method for superfine metal nickel powder. Background technique [0002] At present, in the MLCC industry, nickel metal is generally used as the internal electrode. For different products such as high, medium and low-end products, the content of oxygen in nickel powder has different requirements. The content of nickel oxide in nickel powder directly affects the matching between the manufacturing process and ceramics. and capacitor quality. [0003] In the submicron metal powder preparation industry, chemical vapor deposition (CVD) and physical vapor phase (PVD) methods are used to produce metal nickel powder, and the metal nickel powder produced by the two methods has problems such as nickel oxide content. In the physical vapor phase (PVD) production process, the system uses nitrogen as a carrier to prepare nickel powder in a low-oxy...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B22F9/12B22F1/00
CPCB22F9/12B22F1/145
Inventor 柴立新黄科太
Owner JIANGSU BOQIAN NEW MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap