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Graphene-La2Ti2O7/zinc-aluminum-zirconium corrosion resisting coating for polycrystalline silicon ingot casting furnace

A technology for polysilicon ingot casting furnace and corrosion-resistant coating, which is applied in the preparation of high-temperature-resistant protective layer and high-temperature-resistant protective layer, and the field of corrosion-resistant coating, which can solve the problems that the strength and corrosion resistance need to be improved, and achieve the improvement of mechanical properties , prolong service life, good heat insulation effect

Inactive Publication Date: 2011-09-28
合肥云荣机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned corrosion-resistant coating plays a certain role in protecting the carbon fiber insulation layer as an insulation layer, its strength and corrosion resistance still need to be improved to ensure that the carbon fiber insulation layer has a longer service life.

Method used

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  • Graphene-La2Ti2O7/zinc-aluminum-zirconium corrosion resisting coating for polycrystalline silicon ingot casting furnace
  • Graphene-La2Ti2O7/zinc-aluminum-zirconium corrosion resisting coating for polycrystalline silicon ingot casting furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1 prepares graphene powder

[0055] 1. Add 10g of graphite into the mixed solution of concentrated sulfuric acid and sodium nitrate, the mass ratio of concentrated sulfuric acid and sodium nitrate is 0.5:1, the mass ratio of concentrated sulfuric acid and graphite is 10:1, and the mixed solution is cooled to 0 ° C ~ 5 ℃, stir for 30min, continue to stir and slowly add potassium permanganate, the mass ratio of potassium permanganate to graphite is 2:1, raise the temperature to 10℃~15℃, continue to stir for 12h, and then introduce the mixed solution at a temperature of 30℃ In a water bath at ~40°C, slowly add 200ml of water after reacting for 30min, raise the temperature to 90°C~100°C and keep it for 35min, then add hydrogen peroxide and 100ml of water, the mass ratio of hydrogen peroxide and graphite is 0.5:1, stir for 2h and then use hydrochloric acid and Alternately wash with water for 4 times, filter after rinsing with water, dry the filter cake, grind and ...

Embodiment 2

[0059] 1. Take 25wt% zinc powder with a particle size of 100 mesh, 40wt% aluminum powder with a particle size of 100 mesh, and 40wt% zirconium powder with a particle size of 100 mesh, and mix them uniformly to obtain co-infiltration agent powder; take the prepared co-infiltration agent and carbon fiber heat insulation Put the layer into the vacuum infiltration furnace, and embed the carbon fiber insulation layer in the infiltration agent. The volume ratio of the infiltration agent to the workpiece is 1:1. Vacuum the vacuum furnace to a vacuum degree of less than 0.5kPa. The co-infiltration furnace is heated up to 350°C, and the vacuum furnace is rotated 3 times per minute. After 8 hours of heat preservation, the carbon fiber insulation layer is taken out, cleaned and dried in the sun.

[0060] Samples were taken for testing, and an alloy anti-corrosion layer with a thickness of about 80 microns was formed on the surface of the carbon fiber heat insulation layer. The hardness a...

Embodiment 3

[0065]1. Take 35wt% zinc powder with a particle size of 300 mesh, 35wt% aluminum powder with a particle size of 300 mesh, and 30wt% zirconium powder with a particle size of 300 mesh, and mix them evenly to obtain co-infiltration agent powder; take the prepared co-infiltration agent and carbon fiber heat insulation Put the layer into the vacuum infiltration furnace, and embed the carbon fiber insulation layer in the infiltration agent. The volume ratio of the infiltration agent to the workpiece is 1:1. Vacuum the vacuum furnace to a vacuum degree of less than 0.5kPa. The co-infiltration furnace is heated up to 500°C, and the vacuum furnace is rotated 3 times per minute. After 8 hours of heat preservation, the carbon fiber insulation layer is taken out, cleaned and dried in the sun.

[0066] Samples were taken for testing, and an alloy anti-corrosion layer with a thickness of about 80 microns was formed on the surface of the carbon fiber heat insulation layer. The hardness and c...

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Abstract

The invention provides a corrosion resisting coating for a polycrystalline silicon ingot casting furnace, which is characterized by comprising an alloy anticorrosive coating coated on the surface of a carbon fiber thermal-protective coating and a thermal-insulating anticorrosive coating coated on the surface of the alloy anticorrosive coating, wherein the alloy anticorrosive coating comprises 20 to 38 weight percent of aluminum powder, 30 to 45 weight percent of zinc powder and 30 to 45 weight percent of zirconium powder; the thermal-insulating anticorrosive coating comprises 55 to 72 weight percent of graphene powder, 25 to 40 weight percent of La2Ti2O7 powder, 1 to 5 weight percent of forming agent and 1 to 5 weight percent of mixture of a curing agent and a dispersing agent. The invention also provides a high-temperature resistant protective coating for the polycrystalline silicon ingot casting furnace and a preparation method thereof. The coating of the invention is high in hardness and corrosion resistance, so the service life of a carbon fiber thermal-protective coating is prolonged.

Description

technical field [0001] The invention relates to the field of polysilicon, in particular to a corrosion-resistant coating used in a polysilicon ingot casting furnace, a high-temperature-resistant protective layer composed of the corrosion-resistant coating, and a preparation method for the high-temperature-resistant protective layer. Background technique [0002] As a renewable green energy, solar energy has gradually developed rapidly around the world. Solar photovoltaic power generation is a technology that directly converts light energy into electrical energy by using the photovoltaic effect of the semiconductor interface. Solar cells are connected in series. Encapsulation protection can form large-area photovoltaic modules. With the increasing maturity of solar power generation technology, photovoltaic modules have been widely used in many fields such as artificial satellite energy supply. [0003] The polysilicon ingot furnace is one of the key equipment at the front en...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D1/04C09D5/10C09D5/08C30B29/06C30B28/06
Inventor 李树荣
Owner 合肥云荣机电科技有限公司
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