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Isotropic graphite product and preparation method thereof

A graphite product and isotropic technology, applied in the field of isotropic graphite products and its preparation, can solve the problems of high cost, limited molding method, and scarce resources

Active Publication Date: 2010-02-24
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In terms of raw materials, high-quality isotropic graphite can be prepared from spherical coke prepared from pitch ore produced in Colorado, USA. Recently, it has been reported that mesophase carbon microspheres are used as raw material to prepare isotropic graphite, but resources are scarce and the cost is high. ; The molding method of preparation is limited; the disadvantage of low isotropic performance of the product

Method used

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  • Isotropic graphite product and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of isotropic graphite product, its raw material comprises binder and aggregate, the mass ratio of binder and aggregate is 0.45: 1, and the composition of described aggregate is: natural microcrystalline graphite accounts for aggregate mass The microcrystalline graphite is purified natural microcrystalline graphite with a fixed carbon content of 99.9% and a particle size of ≤40 μm; the binder is coal tar pitch.

[0026] A kind of preparation method of isotropic graphite product, comprises the following steps:

[0027] In the first step, the binder and the aggregate with a mass ratio of 0.45:1 are uniformly kneaded in a kneader at a temperature of 150 ° C. The components of the aggregate are: natural microcrystalline graphite accounts for 1% of the mass of the aggregate 100%; the microcrystalline graphite is purified natural microcrystalline graphite, with a fixed carbon content of 99.9%, and a particle size≤40 μm; the binder is coal tar pitch,

[0028] In the sec...

Embodiment 2

[0034] A kind of isotropic graphite product, its raw material comprises binder and aggregate, the mass ratio of binder and aggregate is 0.45: 1, and the composition of described aggregate is: natural microcrystalline graphite accounts for aggregate mass 90%, pitch coke accounts for 10%; the microcrystalline graphite is purified natural microcrystalline graphite, the fixed carbon content is 99.9%, and the particle size is ≤40 μm; the binder is coal tar pitch.

[0035]A kind of preparation method of isotropic graphite product, comprises the following steps:

[0036] In the first step, the binder and the aggregate with a mass ratio of 0.45:1 are uniformly kneaded in a kneader at a temperature of 150 ° C. The components of the aggregate are: natural microcrystalline graphite accounts for 1% of the mass of the aggregate 90%, pitch coke accounts for 10%; the microcrystalline graphite is purified natural microcrystalline graphite, the fixed carbon content is 99.9%, and the particle s...

Embodiment 3

[0042] A kind of isotropic graphite product, its raw material comprises binder and aggregate, the mass ratio of binder and aggregate is 0.45: 1, and the composition of described aggregate is: natural microcrystalline graphite accounts for aggregate mass 90% of the aggregate, the rest is pitch coke, accounting for 10% of the aggregate mass; the microcrystalline graphite is purified natural microcrystalline graphite, that is, the natural ore with a fixed carbon content of 95% after the ore is purified by chemical or physical methods. Microcrystalline graphite, the particle size of which is less than or equal to 40 μm; the binder is pitch.

[0043] A kind of preparation method of isotropic graphite product, comprises the following steps:

[0044] In the first step, the binder and the aggregate with a mass ratio of 0.45:1 are kneaded uniformly in a kneader at a temperature of 140 ° C. The microcrystalline graphite is purified natural microcrystalline graphite, that is, the raw ore...

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Abstract

The invention relates to an isotropic graphite product and a preparation method thereof. The materials consist of caking agent and skeletal material. The mass ratio of the caking agent and the skeletal material is (0.30-0.70) to 1, wherein the weight of the rarefied natural crystallite graphite is 30 to 100% of that of the skeletal material, and the other materials are one or more than two of thegraphite returning charge, the pitch coke, the refinery coke, the secondary coke and the intermediate carbon sphere. The preparation method comprises the steps of uniformly mixing the caking agent andthe skeletal material, molding, baking, dipping, secondarily baking, and graphitizing. With rich materials, low cost, small limitation for molding, high capability of prepared isotropic graphite product, the invention can be widely applied in the field of preparing graphite product.

Description

technical field [0001] The invention relates to the technical field of graphite preparation, in particular to an isotropic graphite product and a preparation method thereof. Background technique [0002] With the development of modern science and technology, the application of carbon and graphite materials is becoming more and more extensive, and its status is becoming more and more important. Under severe working conditions such as high temperature and radiation, graphite becomes the material of choice. In some high-tech fields, more and more isotropic requirements are put forward for the graphite products used, such as the rapid development of precision machining new technology EDM technology uses more and more graphite molds; the demand is increasing The larger the silicon crystal and other semiconductor materials used in electronics and new energy materials, the heating body and most of the components of the preparation equipment are made of graphite products; while the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/00C01B31/04C04B35/532C04B35/622
Inventor 沈万慈文中华王宁高欣明申克康飞宇郑永平黄正宏刘旋
Owner TSINGHUA UNIV
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