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Novel composite additive for producing low-resistance high-strength graphite as well as preparation method of graphite material

A technology of composite additives and graphite materials, which is applied in the field of graphite materials, can solve problems affecting the mechanical properties of graphite products, achieve the effects of promoting graphitization process, reducing resistivity, and improving flexural strength

Inactive Publication Date: 2017-09-01
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, iron is an element harmful to graphite products, too much addition will affect the mechanical properties of graphite products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Use 1t of coal-based needle coke with a sulfur content of 1% and a nitrogen content of 0.5%, 0.25t of modified coal tar pitch, 3kg of metal titanium powder, and 1kg of lanthanum oxide for batching, wherein the coal-based needle coke particle size ratio (by mass Percentage) is: 12.5% ​​for 1-2mm, 22.5% for 0.5-1mm, 30% for 0.15-0.5mm, 25% for 0.076-0.15mm, 10% for 3 Above, the flexural strength is as high as 12MPa.

Embodiment 2

[0026] Use 1t of coal-based needle coke with a sulfur content of 1%, and a nitrogen content of 0.5%, 0.25t of modified coal tar pitch, 3kg of metal titanium powder, and 2kg of cerium oxide for batching, wherein the coal-based needle coke particle size ratio (by mass Percentage) is: 12.5% ​​for 1-2mm, 22.5% for 0.5-1mm, 30% for 0.15-0.5mm, 25% for 0.076-0.15mm, 10% for 3 Above, the flexural strength is as high as 12MPa.

Embodiment 3

[0028] Use 1t of coal-based needle coke with a sulfur content of 1% and a nitrogen content of 0.5%, 0.25t of modified coal tar pitch, 3kg of metal titanium powder, and 2kg of praseodymium oxide for batching, wherein the coal-based needle coke particle size ratio (by mass Percentage) is: 12.5% ​​for 1-2mm, 22.5% for 0.5-1mm, 30% for 0.15-0.5mm, 25% for 0.076-0.15mm, 10% for 3 Above, the flexural strength is as high as 15MPa.

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Abstract

The invention discloses a novel composite additive for producing low-resistance high-strength graphite as well as a preparation method of the graphite material. The composite additive is a mixture of rare-earth metal powder or a rare-earth compound with titanium metal powder or a titanium compound, wherein the mass ratio of the two substances is (1:1)-(1:5) when the two substances are mixed; the rare-earth compound is selected from one or more of rare-earth organic compounds and rare-earth inorganic compounds; and the titanium compound is selected from one or more of titanium organic compounds and titanium inorganic compounds.

Description

technical field [0001] The invention relates to the technical field of graphite materials, in particular to a novel composite additive for producing low-resistance and high-strength graphite materials and a preparation method for the low-resistance and high-strength graphite materials. Background technique [0002] One of the key factors affecting the performance of graphite products during the graphitization process is gas expansion. When the baked product is in the graphitization furnace, when the temperature rises above 1400 ° C, elements such as hydrogen, sulfur, and nitrogen will be converted into H 2 、H 2 S, N 2 , NH 3 Among them, the nitrogen element is mainly released at 1400-1900°C, and the sulfur element is concentrated in the range of 1700-2100°C. At this time, the pore wall of the coke in a plastic state is under the pressure of the exhaust gas, and the volume expands and decreases. The physical and chemical properties of graphite products. By adding a gas ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/52C04B35/63
CPCC04B35/522C04B35/63C04B35/6303C04B2235/3224C04B2235/3227C04B2235/3229C04B2235/404C04B2235/48C04B2235/5427C04B2235/5436C04B2235/77C04B2235/96
Inventor 路贵民王榕艳于建国
Owner EAST CHINA UNIV OF SCI & TECH
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