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Preparation method of Ni/C composite conductive powder

A technology of composite conductive powder and graphite powder, which is applied in the direction of metal/alloy conductor, cable/conductor manufacturing, carbon-silicon compound conductor, etc., can solve the application limitation of Ni/C composite powder, the coating of nickel shell is not dense, Solve the problems of high cost of nickel plating, and achieve the effect of uniform, dense and continuous coating, strong bonding force and low cost

Pending Publication Date: 2020-12-08
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the research on Ni / C composite powder has problems such as cumbersome process, non-dense coating of nickel shell, and high cost of nickel plating, so the application of Ni / C composite powder is limited.

Method used

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  • Preparation method of Ni/C composite conductive powder
  • Preparation method of Ni/C composite conductive powder
  • Preparation method of Ni/C composite conductive powder

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preparation example Construction

[0029] A kind of preparation method of Ni / C composite conductive powder of the present invention, specifically implement according to the following steps:

[0030] Step 1, placing graphite in a muffle furnace for calcination, and keeping it warm for a period of time to obtain flaky graphite;

[0031] The heating temperature of the muffle furnace is 350-400°C, and the holding time is 1h-3h;

[0032] Step 2, utilizing lye to carry out degreasing treatment to the flake graphite;

[0033] Specifically: put the flake graphite in the lye, perform ultrasonic treatment, then suction filter and wash with deionized water until the filtrate is neutral;

[0034] The average particle size of flaky graphite is 4 μm to 15 μm, and the purity is greater than 98%;

[0035] The mass ratio of flake graphite to deionized water is 1:70~180; the mass concentration of lye is 80~160g / L; the ultrasonic treatment time is 35~65min, and the temperature is 60~85℃.

[0036] Step 3, placing the graphite p...

Embodiment 1

[0048] A kind of preparation method of Ni / C composite conductive powder, specifically implement according to the following steps:

[0049] Step 1, place the graphite in a muffle furnace, calcinate it at 350°C and keep it warm for 2.5 hours;

[0050] Step 2, the flaky graphite is placed in the lye for ultrasonic treatment, then suction filtered and washed with deionized water until the filtrate is neutral, the mass ratio of the flaky graphite to deionized water is 1:70, and the temperature of the ultrasonic wave is 65°C, the treatment time is 35min, and the mass concentration of the lye used is 80g / L;

[0051] Step 3, place the graphite powder obtained in step 2 in dilute hydrochloric acid solution for ultrasonic treatment, then suction filter and wash with deionized water until the filtrate is neutral, the mass ratio of graphite powder to dilute hydrochloric acid solution is 1:90, The mass concentration of dilute hydrochloric acid is 6ml / L, the time of ultrasonic treatment is...

Embodiment 2

[0059] A kind of preparation method of Ni / C composite conductive powder, specifically implement according to the following steps:

[0060] Step 1, place the graphite in a muffle furnace for calcination at 360°C and keep it warm for 2 hours;

[0061] Step 2, the flaky graphite is placed in the lye for ultrasonic treatment, then suction filtered and washed with deionized water until the filtrate is neutral, the mass ratio of the flaky graphite to deionized water is 1:120, and the temperature of the ultrasonic wave is 70°C, the treatment time is 45min, and the mass concentration of the lye used is 100g / L;

[0062] Step 3, place the graphite powder obtained in step 2 in dilute hydrochloric acid solution for ultrasonic treatment, then suction filter and wash with deionized water until the filtrate is neutral, the mass ratio of graphite to dilute hydrochloric acid solution is 1:100, dilute hydrochloric acid The mass concentration is 7ml / L, the ultrasonic treatment time is 35min, an...

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Abstract

The invention discloses a preparation method of Ni / C composite conductive powder. The preparation method comprises the following steps that graphite is calcined to obtain flaky graphite; the flake graphite is subjected to oil removal treatment by using alkali liquor; the graphite powder is put into a diluted hydrochloric acid solution, and then ultrasonic treatment and washing are carried out; then NiSO4. 6H2O, Na3C6H5O7 and CH4N2S are dissolved into deionized water under the condition of room temperature, and then the pH is adjusted by using a NaOH solution to obtain a nickel plating solution; and then the graphite powder is added into the nickel plating solution, a hydrazine hydrate solution is added while stirred, ultrasonic treatment is carried out, then hydrothermal reaction, washingand drying are carried out to obtain the Ni / C composite conductive powder. According to the preparation method of the Ni / C composite conductive powder, the Ni / C composite conductive powder is preparedthrough a hydrothermal reduction method, the flake graphite is completely plated, a plating layer is uniform, compact and continuous, the binding force between the nickel plating layer and a graphitesubstrate is high, and the conductivity of the material is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of conductive material preparation, and in particular relates to a method for preparing Ni / C composite conductive powder. Background technique [0002] Metal-graphite composite materials not only have the superior lubricating properties of graphite, but also have the good electrical and thermal conductivity of metal, and can provide excellent performance that cannot be obtained by a single material. By coating nickel on the graphite powder, physical properties such as electrical conductivity, corrosion resistance, hardness, and lubricity can be significantly improved, and an excellent composite material can be formed. [0003] Ni / C composite powder can not only be used as an improved conductive material, but also can be used as corrosion-resistant and wear-resistant coatings, thermal barrier and sealing coatings, microwave absorbing materials, etc. Among them, the quality of the coating has a very important...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02C23C18/34H01B1/02H01B1/04H01B13/00C01B32/21
CPCC23C18/34H01B1/02H01B1/04H01B13/0016C01B32/21B22F1/17
Inventor 苏晓磊司佳佳刘毅
Owner XI'AN POLYTECHNIC UNIVERSITY
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