Method for preparing siliconized graphite structure material

A technology of structural materials and silicified graphite, which is applied in the field of preparing silicified graphite structural materials, can solve the problems of serious energy consumption, achieve the effects of reduced reaction time, easy hardening, and increased contact area

Inactive Publication Date: 2020-06-09
江苏嘉明碳素新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, no matter which method is adopted, it faces the practical problem of serious energy consumption. For example, when the temperature is 1800°C and the pressure is 30MPa, the impregnation depth can reach 20mm.
And as the thickness increases, the required temperature or pressure is also higher, and the energy consumption is extremely serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing silicided graphite structure material, the steps are as follows:

[0026] S1. Preparation of graphite oxide: using graphite as a raw material, graphite oxide was prepared by a modified Hummers method.

[0027] S2, prepare the initial material: use water as a solvent, configure graphite oxide solution, add soluble transition metal salt to the prepared graphite oxide solution, stir evenly, ultrasonic treatment for 4h, add the mixed graphite oxide and transition metal salt solution to the In the hydrothermal reaction kettle, the temperature is 110°C, and the time is 5h. After cooling, filter and dry to obtain the primary material of the composite material of reduced graphite oxide and transition metal oxide; when configuring graphite oxide, use deionized water. Solution concentration is 20wt%; Described transition metal salt is Mn and Fe nitrate; The addition of soluble transition metal salt is 5% of graphite oxide solution quality; The drying temper...

Embodiment 2

[0033] A method for preparing silicided graphite structure material, the steps are as follows:

[0034] S1, preparing graphite oxide: using graphite as raw material, adopting modified Hummers method to prepare graphite oxide;

[0035] S2, prepare the initial material: use water as a solvent, configure graphite oxide solution, add soluble transition metal salt to the prepared graphite oxide solution, stir evenly, ultrasonic treatment for 8h, add the mixed graphite oxide and transition metal salt solution to the In the hydrothermal reaction kettle, the temperature is 160°C, and the time is 15h. After cooling, filter and dry to obtain the primary material of reduced graphite oxide and transition metal oxide composite materials; when configuring graphite oxide, use deionized water, and the configured The concentration of the solution is 35 wt%; the transition metal salt is the chloride of Cu and Zn; the addition of the soluble transition metal salt is 15% of the quality of the gra...

Embodiment 3

[0041] A method for preparing silicided graphite structure material, the steps are as follows:

[0042] S1, preparing graphite oxide: using graphite as raw material, adopting modified Hummers method to prepare graphite oxide;

[0043] S2, prepare the initial material: use water as a solvent, configure graphite oxide solution, add soluble transition metal salt to the prepared graphite oxide solution, stir evenly, ultrasonic treatment for 12h, add the mixed graphite oxide and transition metal salt solution to the In the hydrothermal reaction kettle, the temperature is 200°C, and the time is 24h. After cooling, filter and dry to obtain the primary material of the composite material of reduced graphite oxide and transition metal oxide; when configuring graphite oxide, use deionized water. The solution concentration is 50 wt%; the transition metal salts are Sc and Cu nitrates; the addition of soluble transition metal salts is 25% of the quality of the graphite oxide solution; the d...

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Abstract

The invention discloses a method for preparing a siliconized graphite structure material. A nanoscale transition metal element is uniformly added into reduced graphite oxide through a graphite oxide hydrothermal method. When the transition metal element is used as a catalyst, the distribution is more uniform, the uniform formation of silicified graphite is facilitated, and meanwhile, the reactiontemperature and the reaction time are greatly reduced due to the high activity of a nanoscale material and the high catalytic performance of the transition metal. No vacuum protection or pressurization is needed in the reaction process, so that the reaction energy consumption is greatly reduced.

Description

technical field [0001] The invention relates to a method for preparing a siliconized graphite structure material. Background technique [0002] Silicified graphite is a new type of composite material composed of silicon carbide, free silicon and graphite, also known as graphite and silicon carbide composite material, silicon-impregnated graphite). Silicified graphite material not only retains the excellent self-lubricating properties, good electrical conductivity, thermal conductivity and high thermal shock resistance of graphite materials, but also has the advantages of high hardness, wear resistance, oxidation resistance and chemical corrosion resistance of silicon carbide materials, fully embodying the The synergistic complementarity of the two materials is revealed. It is an ideal structural material, suitable for harsh occasions such as high load, high temperature environment or large temperature shock. Products are widely used in strategic emerging industries such as...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/83C04B35/52C04B35/532C04B35/573C04B35/63C04B35/632
CPCC04B35/522C04B35/532C04B35/573C04B35/6303C04B35/632C04B35/83C04B2235/3217C04B2235/3224C04B2235/3262C04B2235/3272C04B2235/3281C04B2235/3284C04B2235/3826C04B2235/386C04B2235/422C04B2235/425C04B2235/5248C04B2235/602C04B2235/606C04B2235/656C04B2235/6567C04B2235/96
Inventor 薛喜利董伟薛明虎
Owner 江苏嘉明碳素新材料有限公司
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