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A kind of sealing graphite and preparation method thereof

A technology of special graphite and graphite, which is applied in the field of sealed graphite and its preparation, can solve problems such as the inability to meet the performance requirements of graphite sealing materials, and achieve the effects of excellent physical and chemical indicators, low wear, and meeting the requirements of use

Active Publication Date: 2020-09-15
黑龙江省鑫顺石墨有限责任公司
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a sealed graphite and a preparation method thereof in order to solve the above problems, so as to solve the problems that traditional carbon-graphite sealing materials in the prior art cannot meet the performance requirements of aerospace development for graphite sealing materials, etc.

Method used

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Embodiment Construction

[0044] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0045]A kind of sealed graphite provided by the present invention is prepared by mixing bone powder with a weight ratio of 25-70% and a binder with a weight ratio of 30-75%, followed by pressing, carbonization, purification, impregnation, and solidification, wherein, The optimal weight ratio of bone powder and binder is 72:28, the bulk density of the prepared sealed graphite is ≥1.72g / cm3, the resistivity is ≤6.0μΩm, the flexural strength is ≥55Mpa, the compress...

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Abstract

The invention discloses a copper-based pantograph carbon contact strip made from a graphene copper-based nano selenium niobium composite material. The graphene copper-based nano selenium niobium composite material is prepared from, by weight, 70-75% of a mixture and 25-30% of an adhesive by mixing, pressing, calcining and copper impregnating. By adoption of a preparation method of the copper-basedpantograph carbon contact strip, the copper-based pantograph carbon contact strip is high in abrasion resistance, low in friction coefficient, high in conductivity and great in cost performance and impact resistance, problems in use of existing pantograph carbon contact strips are effectively solved, and high practicality is realized.

Description

technical field [0001] The invention relates to the field of novel graphite materials, in particular to a sealing graphite and a preparation method thereof. Background technique [0002] Sealed graphite parts are indispensable and important parts in mechanical equipment. They have the characteristics of corrosion resistance, strong oxidation resistance and low resistance, so they are widely used in machinery, petroleum, chemical industry, fertilizer, synthetic rubber, instrumentation, hydraulic rotation and other equipment And other industrial industries, especially in low temperature, high temperature, vacuum, high pressure and various corrosive, flammable, explosive and toxic medium environments, it is an ideal sealing material for mechanical equipment. [0003] Carbon-graphite sealing materials have the advantages of high thermal conductivity, low friction coefficient, low expansion coefficient, high heat resistance, high shock resistance, good chemical stability, and eas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/532C04B35/622
CPCC04B35/522C04B35/532C04B35/622
Inventor 闵洁张培林庞中海武建军刘伟凯纪永良雷涛张彦举霍有
Owner 黑龙江省鑫顺石墨有限责任公司
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