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Rotary furnace carbon-ceramic furnace tube for CVD carbon vapor deposition, rotary furnace and preparation method of carbon-ceramic furnace tube

A technology of chemical vapor deposition and rotary furnace, applied in the direction of gaseous chemical plating, coating, metal material coating process, etc., can solve the problems of easy hydrogen embrittlement, poor oxidation resistance, easy introduction of metal impurities, etc., and achieve the solution of hydrogen Effects of brittle reaction, low cost, and simple preparation method

Pending Publication Date: 2021-09-21
HUNAN KINGI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The third object of the present invention is to provide a rotary furnace for CVD carbon vapor deposition, which uses a furnace tube made of carbon ceramic material, which can meet the requirements of silicon or silicon-based negative electrode carbon coating process, and solve the existing problems. Furnace tubes made of stainless steel have poor oxidation resistance, are likely to cause hydrogen embrittlement, and are easy to introduce technical problems such as metal impurities.

Method used

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  • Rotary furnace carbon-ceramic furnace tube for CVD carbon vapor deposition, rotary furnace and preparation method of carbon-ceramic furnace tube
  • Rotary furnace carbon-ceramic furnace tube for CVD carbon vapor deposition, rotary furnace and preparation method of carbon-ceramic furnace tube
  • Rotary furnace carbon-ceramic furnace tube for CVD carbon vapor deposition, rotary furnace and preparation method of carbon-ceramic furnace tube

Examples

Experimental program
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Effect test

Embodiment 1

[0041] 1) multi-layer fabric of carbon fiber fabric (no intersection sheeting) and fetal alternately laminated carbon fiber web, a foam using a cylindrical model, is less than the outer diameter of the cylindrical foam models carbon ceramic tube inner diameter 1cm, and a length greater than the carbon - ceramic tube length 4cm, carbon fiber preform body diameter greater than the tubular rotary kiln furnace carbon finished 1cm ceramic tube, excess length cut in a subsequent machining process. The network no sheeting and tire the model surface of the cylindrical foam are alternately circulated ply, layer 16 superposed layers. Are each needling superposed layers, the needle 30 to / cm 3 Needling density of the composite tubular structure constituted, after 300 ℃, 15h heat curing treatment to give 0.6g / cm 3 Carbon fiber preform.

[0042] 2) The carbon fiber preform by chemical vapor deposition, a chemical vapor deposition process comprises a pretreatment and a isothermal pressure ch...

Embodiment 2

[0047] 1) multi-layer fabric of carbon fiber fabric (no intersection sheeting) and fetal alternately laminated carbon fiber web, a foam using a cylindrical model, is less than the outer diameter of the cylindrical foam models carbon ceramic tube inner diameter 1cm, and a length greater than the carbon - ceramic tube length 4cm, carbon fiber preform body diameter greater than the tubular rotary kiln furnace carbon finished 1cm ceramic tube, excess length cut in a subsequent machining process. The network no sheeting and tire the model surface of the cylindrical foam are alternately circulated ply, layer 16 superposed layers. Are each needling superposed layers, the needle 30 to / cm 3 Needling density of the composite tubular structure constituted, after 300 ℃, 15h heat curing treatment to give 0.6g / cm 3 Carbon fiber preform.

[0048] 2) The carbon fiber preform by chemical vapor deposition, a chemical vapor deposition process comprises a pretreatment and a isothermal pressure ch...

Embodiment 3

[0053] 1) multi-layer fabric of carbon fiber fabric (no intersection sheeting) and fetal alternately laminated carbon fiber web, a foam using a cylindrical model, is less than the outer diameter of the cylindrical foam models carbon ceramic tube inner diameter 1cm, and a length greater than the carbon - ceramic tube length 4cm, carbon fiber preform body diameter greater than the tubular rotary kiln furnace carbon finished 1cm ceramic tube, excess length cut in a subsequent machining process. The network no sheeting and tire the model surface of the cylindrical foam are alternately circulated ply, layer 16 superposed layers. Are each needling superposed layers, the needle 30 to / cm 3 Needling density of the composite tubular structure constituted, after 300 ℃, 15h heat curing treatment to give 0.6g / cm 3 Carbon fiber preform.

[0054] 2) The carbon fiber preform by chemical vapor deposition, a chemical vapor deposition process comprises a pretreatment and a isothermal pressure ch...

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Abstract

The invention discloses a rotary furnace carbon-ceramic furnace tube for CVD carbon vapor deposition, a rotary furnace and a preparation method of the carbon-ceramic furnace tube. The preparation method of the carbon ceramic furnace tube comprises: alternately overlaying multiple layers of carbon fiber non-woven cloth and carbon fiber net tires and compounding in a needling mode to form a tubular structure, and after the tubular structure is subjected to thermocuring treatment and chemical vapor deposition, obtaining a furnace tube blank; machining the blank, and obtaining a finish machining furnace tube blank; and carrying out melt siliconizing treatment and silicon carbide treatment on the finish-machined furnace tube blank to obtain the carbon-ceramic furnace tube. The carbon ceramic furnace tube has the advantages of low density, wear resistance, high strength, oxidation resistance, no heat fading and the like, particularly does not react with hydrogen and hydrocarbon organic gas to generate hydrogen embrittlement corrosion rupture, can prevent metal impurities from being introduced in the processing process of a silicon-based negative electrode material, and can be widely applied to CVD carbon vapor deposition, coating and a high-temperature furnace tube in various processes such as ammonia decomposition hydrogen.

Description

Technical field [0001] The present invention relates to a rotary furnace tube and a preparation method thereof, in particular to a rotary furnace carbon ceramic stove and preparation method for CVD carbon gas deposition, and is also related to a CVD carbon gas having a carbon pottery tube. The deposited rotary furnace belongs to the field of CVD carbon gas phase deposition technology. Background technique [0002] With the rapid development of electric vehicles, energy storage power stations and portable electronic equipment, high-proportional lithium-ion batteries are increasingly concerned. [0003] However, the current graphite negative is still firmly dominated, and its theoretical comparison 372mAh / g has not been able to meet the requirements of high-grade battery negative electrode materials, and severely constrain the energy density of lithium battery. [0004] Over the years, scientists have attempted to develop a negative electrode material that can replace graphite, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/52C23C16/26C23C16/44
CPCC04B35/83C04B35/52C23C16/44C23C16/26C04B2235/5248C04B2235/428C04B2235/656C04B2235/6567C04B2235/658C04B2235/3826C04B2235/96
Inventor 易旭廖寄乔
Owner HUNAN KINGI TECH CO LTD
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