Silicon steam corrosion resistant coating and preparation method thereof

A technology of silicon vapor and coating, which is applied in the field of coating preparation, can solve the problems of high cost, unfavorable human health, poor high temperature performance, etc., and achieve the effect of low cost, good lubricity and reduced corrosion

Inactive Publication Date: 2015-09-23
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of high cost, poor high-temperature performance and adverse effects on human health existing in the prior art, the present invention proposes a silicon vapor corrosion-resistant coating and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] This embodiment is an anti-silicon vapor corrosion coating, which is prepared by mixing hexagonal boron nitride, ethanol, glycerin and diluent evenly. The mass percentage of each material is: hexagonal boron nitride is 15 %, ethanol is 2%, glycerol is 3% and diluent is 80%, diluent is distilled water or deionized water. In this embodiment, the diluent is distilled water.

[0017] This embodiment also proposes a method for preparing the anti-silicon vapor corrosion coating, the specific steps are:

[0018] Step 1, proportionally weighing materials: including 15% hexagonal boron nitride, 2% ethanol, 3% glycerol and 80% diluent. In this embodiment, the diluent is deionized water.

[0019] Step 2, preparing the solution: put the weighed diluent into the beaker, and add the weighed ethanol and glycerol into the beaker. After heating the beaker to 30-35°C, use a DJ1C booster electric stirrer to stir and mix evenly; the speed of the stirrer is 200-280r / min, and the stirring...

Embodiment 2

[0025] This embodiment is an anti-silicon vapor corrosion coating, which is prepared by mixing hexagonal boron nitride, ethanol, glycerol and diluent evenly, and the mass percentage of each material is: hexagonal boron nitride is 20 %, ethanol is 5%, glycerol is 5% and diluent is 70%, and diluent is distilled water or deionized water. In this embodiment, the diluent is deionized water.

[0026] This embodiment also proposes a method for preparing the anti-silicon vapor corrosion coating, the specific steps are:

[0027] Step 1, proportionally weighing materials: including 20% ​​hexagonal boron nitride, 5% ethanol, 5% glycerol and 70% diluent.

[0028] Step 2, preparing the solution: put the weighed diluent into the beaker, and add the weighed ethanol and glycerol into the beaker. After heating the beaker to 30-35°C, use a DJ1C booster electric stirrer to stir and mix evenly; the speed of the stirrer is 200-280r / min, and the stirring time is 4-6min; a well-mixed solution is o...

Embodiment 3

[0034] This embodiment is an anti-silicon vapor corrosion coating, which is prepared by stirring hexagonal boron nitride, ethanol, glycerin and diluent evenly. The mass percentage of each material is: hexagonal boron nitride is 30 %, ethanol is 2%, glycerol is 3% and diluent is 65%, and diluent is distilled water or deionized water. In this embodiment, the diluent is dedistilled water.

[0035] This embodiment also proposes a method for preparing the anti-silicon vapor corrosion coating, the specific steps are:

[0036] Step 1, proportionally weighing materials: including 30% hexagonal boron nitride, 2% ethanol, 3% glycerol and 65% diluent.

[0037] Step 2, preparing the solution: put the weighed diluent into the beaker, and add the weighed ethanol and glycerol into the beaker. After heating the beaker to 30-35°C, use a DJ1C booster electric stirrer to stir and mix evenly; the speed of the stirrer is 200-280r / min, and the stirring time is 4-6min; a well-mixed solution is obt...

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PUM

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Abstract

The invention discloses a silicon steam corrosion resistant coating and a preparation method thereof. The coating is prepared from the following components in percentage by mass: 15-35% of hexagonal boron nitride, 1-10% of ethanol, 1-10% of glycerol and 50-80% of a diluent, wherein the total percentage of the components is 100%. The coating can be utilized for protecting a graphite crucible under the atmosphere of high-temperature silicon steam at 1700 DEG C or higher, so that the surface of the graphite crucible can be protected to a great extent, and the corrosion caused by the silicon steam is reduced; the coating can further be utilized for the surfaces of a heat preservation barrel, a heater and other main graphite toolings in addition to the crucible; moreover, the coating has the characteristics of being simple in technical process, low in cost, suitable for popularization and application, high in high-temperature property and harmless to a human body.

Description

technical field [0001] The invention relates to the field of anti-silicon vapor corrosion, in particular to a method for preparing a coating for an anti-silicon vapor corrosion graphite crucible. Background technique [0002] In my country, the development of solar photovoltaic industry has led to the rapid development of various silicon industries such as monocrystalline silicon and polycrystalline silicon. At present, China's production capacity has exceeded half of the world's total production capacity. In these industries, high-temperature environments are generally involved, so most of them use imported isostatic graphite or domestic three-high graphite, which require them to have a longer life. The main reason is that the price of the photovoltaic industry continues to decline, and various industrial chains need to reduce costs. , and the graphite crucible is a very important tooling. As the main consumable, improving the life of the graphite crucible can significantl...

Claims

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Application Information

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IPC IPC(8): C04B41/87
Inventor 赵瑞全王强刘海平张卓杜淑娣
Owner XIAN AVIATION BRAKE TECH
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