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Preparation method of silicon carbon microcrystalline composite material for dynamic seal of internal combustion engine

A composite material, silicon carbon technology, applied in the direction of lubricating composition, petroleum industry, additives, etc., to achieve the effect of good lubrication and sealing performance

Inactive Publication Date: 2017-03-22
北京三联创业科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method can only dynamically seal the rotating method

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  • Preparation method of silicon carbon microcrystalline composite material for dynamic seal of internal combustion engine

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preparation example Construction

[0019] The invention provides a method for preparing a silicon-carbon microcrystalline composite material used for internal combustion engine sealing, comprising:

[0020] Step 1, placing polysilicon and graphite powder in a ball mill, and ball milling to obtain a silicon-carbon mixture with a particle size of less than 15 μm;

[0021] Step 2. Put the silicon-carbon mixture in the induction furnace, firstly carry out vacuum treatment, so that the absolute pressure in the induction furnace reaches 0.0.001Pa, and then fill the induction furnace with argon gas, first make the induction furnace The absolute pressure in the furnace is raised to 0.01MPa, and maintained at this pressure for 10-15 minutes, and then continue to feed argon, so that the absolute pressure in the induction furnace is raised to 0.03MPa, and maintained at this pressure for 5-7min , and then continue to feed argon, so that the absolute pressure in the induction furnace rises to 0.05MPa, and maintain the press...

Embodiment 1

[0030] Step 1, placing polysilicon and graphite powder in a ball mill, and ball milling to obtain a silicon-carbon mixture with a particle size of less than 15 μm;

[0031] Step 2. Put the silicon-carbon mixture in the induction furnace, firstly carry out vacuum treatment, so that the absolute pressure in the induction furnace reaches 0.0.001Pa, and then fill the induction furnace with argon gas, first make the induction furnace The absolute pressure in the furnace was raised to 0.01MPa, and maintained at this pressure for 15 minutes, then continued to feed argon, so that the absolute pressure in the induction furnace was raised to 0.03 MPa, and maintained at this pressure for 7 minutes, and then continued to pass through Enter argon to raise the absolute pressure in the induction furnace to 0.05 MPa, and maintain the pressure for 3 minutes; then start heating, raise the temperature in the induction furnace to 1400 ° C, and continue heating at this temperature for 15 minutes ;...

Embodiment 2

[0035] Step 1, placing polysilicon and graphite powder in a ball mill, and ball milling to obtain a silicon-carbon mixture with a particle size of less than 15 μm;

[0036] Step 2. Put the silicon-carbon mixture in the induction furnace, firstly carry out vacuum treatment, so that the absolute pressure in the induction furnace reaches 0.0.001Pa, and then fill the induction furnace with argon gas, first make the induction furnace The absolute pressure in the furnace rose to 0.01MPa, and maintained at this pressure for 10 minutes, then continued to feed argon, so that the absolute pressure in the induction furnace rose to 0.03MPa, and maintained at this pressure for 5 minutes, and then continued to pass through Enter argon to raise the absolute pressure in the induction furnace to 0.05 MPa, and maintain the pressure for 2 minutes; then start heating, raise the temperature in the induction furnace to 1400 ° C, and continue heating at this temperature for 10 minutes ; Then stop he...

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Abstract

The invention discloses a preparation method of a silicon carbon microcrystalline composite material for dynamic seal of an internal combustion engine. The preparation method comprises the following steps: Step 1, placing polysilicon and graphite powder into a ball mill, and ball-milling to obtain a silicon carbon mixture with granularity being less than 15 micons; Step 2, carrying out vacuum-pumping treatment to make absolute pressure reach 0.0.001 Pa, introducing argon to let absolute pressure rise to 0.01 MPa, maintaining for 10-15 min, continuously introducing argon to let absolute pressure rise to 0.03 MPa, maintaining for 5-7 min, continuously introducing argon to let absolute pressure rise to 0.05 MPa, and maintaining for 2-3 min; heating to let temperature rise to 1400 DEG C; cooling to room temperature to obtain silicon carbon fine powder; and Step 3, preparing silicon carbon microcrystalline particles with granularity being 500-700 nm. By adding the prepared silicon carbon microcrystalline composite material into lubricating oil, lubricity and sealing performance can be better enhanced.

Description

technical field [0001] The invention relates to a method for preparing a silicon-carbon microcrystalline composite material used for internal combustion engine sealing. Background technique [0002] An internal combustion engine is a kind of power machinery, which is a heat engine that directly converts the heat energy released by burning fuel inside the machine into power. An internal combustion engine is a heat engine that mixes liquid or gaseous fuel with air and directly inputs it into the machine for combustion to generate heat energy and then converts it into mechanical energy. The internal combustion engine has the characteristics of small size, small mass, easy to move, high thermal efficiency, and good starting performance. However, internal combustion engines generally use petroleum fuels, and the exhaust gas discharged at the same time contains relatively high components of harmful gases. [0003] Internal combustion engines include reciprocating piston internal...

Claims

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Application Information

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IPC IPC(8): C10M125/26C10N30/06
CPCC10M125/26C10M2201/041C10M2201/105C10N2030/06C10N2030/36C10N2030/54C10N2020/06
Inventor 李民
Owner 北京三联创业科技发展有限公司