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Method for grading and refining graphite and preparing solvent-type conductive ink different in performance

A conductive ink, solvent-based technology, applied in the direction of ink, centrifuge with rotating drum, centrifuge, etc., can solve the problems of conductive performance, particle size difference, graphite waste, etc.

Inactive Publication Date: 2017-02-22
SHENZHEN JIUCHENG PRINTING ELECTRONICS RES INST CO LTD
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Problems solved by technology

[0003] However, the particle size of the ground graphite particles is normally distributed, and not all the particle sizes of the graphite particles are within the required range, and even some particles have very different particle sizes.
Directly adding the ground graphite particles into the ink will have a certain impact on its electrical conductivity, and also lead to waste of graphite

Method used

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  • Method for grading and refining graphite and preparing solvent-type conductive ink different in performance
  • Method for grading and refining graphite and preparing solvent-type conductive ink different in performance
  • Method for grading and refining graphite and preparing solvent-type conductive ink different in performance

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with specific examples, but the protection scope of the present invention is not limited to the following examples.

[0020] First, use a ball mill to grind the purchased natural flake graphite to 10 μm through impact, grinding, and friction. However, due to the limitation of the grinding process level, the distribution of the ground graphite particles conforms to the normal distribution, but still mainly Centered at 10 μm.

[0021] A large part of the ground particle size in the finished product is not 10 μm. Since sieving is more efficient in classifying particles above 100 μm, graphite particles larger than 100 μm are firstly selected with a graphite coarse-fine sieve.

[0022] Then use the principle of centrifugal classification to classify graphite particles of various sizes. Because the gravitational field has too little force on the fine particles, it is difficult to classify the fine partic...

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Abstract

The invention provides a method for refining graphite and preparing solvent-type conductive ink different in performance. The method includes the steps that ink is graded, graphite particles with the particle size being 100 micrometers or more are screened out, remaining graphite particles are graded centrifugally, and the graphite particles different in particle size are graded according to difference of particle settling velocity to obtain four kinds of graphite at different grades. Graphite can be fully used, graphite at different grades can be made to take effect respectively, and it is avoided that conductivity of the prepared ink is affected as graphite particle size difference is too large. Different formulas are designed for ink at different grades, difference in performance and price of graphite at different grades is fully considered in the designed formulas, and the economic value of graphite can be brought into play to the maximum by the four kinds of solvent-type conductive ink prepared correspondingly.

Description

technical field [0001] The invention provides a method for fully processing and utilizing graphite, in particular to a method for classifying and refining graphite and correspondingly preparing solvent-based conductive inks with different performances, belonging to the technical field of inks. Background technique [0002] Graphite is an important industrial raw material with a wide range of uses. Due to the conductivity of graphite, graphite is often added as a conductive filler when preparing conductive inks in the ink field. However, since conductive inks with different properties have different requirements for the particle size of the added graphite, when preparing a certain conductive ink, it is necessary to grind the graphite to an appropriate particle size range before adding it. [0003] However, the particle size of the ground graphite particles is normally distributed, not all the particle sizes of the graphite particles are within the required range, and even so...

Claims

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Application Information

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IPC IPC(8): C09D11/52C09D11/104C09D11/105C09D11/102C09D11/103C09D11/03B04B3/00
CPCC09D11/52B04B3/00C09D11/03C09D11/102C09D11/103C09D11/104C09D11/105
Inventor 钱俊郭陈凤陈实李冰李伟黄文天刘雪瑞钱雨婷陈松陈骞傅显辉马立胜
Owner SHENZHEN JIUCHENG PRINTING ELECTRONICS RES INST CO LTD
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