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Silicon nitride-silicon carbide-corundum sagger and preparation method thereof

A silicon carbide and silicon nitride technology, applied in the field of refractory materials, can solve the problems of high cost of refractory materials, high cost of raw materials, complex synthesis process, etc., and achieves low breakage rate, good dimensional stability, and good chemical stability. Effect

Inactive Publication Date: 2019-05-07
无锡尚臻新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, whether it is in life or in production, there is a huge demand for refractory materials. However, the cost of raw materials is high and the synthesis process is complicated, which makes the cost of the final refractory materials remain high. Using monocrystalline silicon or polycrystalline silicon cutting waste as the main raw material can Greatly reduce its cost and prepare the saggar we need

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 70 parts by weight of polysilicon cutting slag, 5 parts of alumina micropowder, 10 parts of fused corundum powder, 1 part of polyvinyl alcohol and 3 parts of nitriding sintering accelerator for use; first weigh the polysilicon cutting slag and add it to the ball mill At the same time, add water with the same quality, after wet ball milling for 1 hour, pour it out, and remove iron; continue to add the polysilicon cutting slag after iron removal to the ball mill, and add alumina micropowder and fused corundum powder according to the formula ratio , add polyvinyl alcohol and nitriding sintering accelerator at the same time, continue ball milling for 6 hours, pour into the slurry storage tank for spray granulation; weigh the granulation powder and pour it into the sagger mold, and use a double-sided pressurized oil press to add Compression forming; put the formed sagger blank into the nitriding kiln, close the kiln door to vacuumize, and inject nitrogen until the atmosp...

Embodiment 2

[0032] Take 85 parts by weight of polysilicon cutting slag, 10 parts of alumina micropowder, 20 parts of fused corundum powder, 3 parts of polyvinyl alcohol and 5 parts of nitriding sintering accelerator for use; first weigh the polysilicon cutting slag and add it to the ball mill At the same time, add water with 1.5 times its mass, after wet ball milling for 3 hours, pour it out, and remove iron; continue to add the polysilicon cutting slag after iron removal to the ball mill, and add alumina micropowder and fused corundum according to the formula ratio powder, add polyvinyl alcohol and nitriding sintering accelerator at the same time, continue ball milling for 10 hours, pour into the slurry storage tank for spray granulation; weigh the granulation powder and pour it into the sagger mold, and use double-sided pressurized oil press Pressure forming; put the shaped sagger blank into the nitriding kiln, close the kiln door to vacuumize, and inject nitrogen until the atmosphere in...

Embodiment 3

[0034] Take 80 parts by weight of polysilicon cutting slag, 7 parts of alumina micropowder, 15 parts of fused corundum powder, 2 parts of polyvinyl alcohol and 4 parts of nitriding sintering accelerator for use; first weigh the polysilicon cutting slag and add it to the ball mill At the same time, add 1.2 times its mass of water, after wet ball milling for 2 hours, pour it out, and remove iron; continue to add the polysilicon cutting slag after iron removal to the ball mill, and add alumina micropowder and fused corundum powder according to the formula ratio , add polyvinyl alcohol and nitriding sintering accelerator at the same time, continue ball milling for 8 hours, pour into the slurry storage tank for spray granulation; weigh the granulation powder and pour it into the sagger mold, and use a double-sided pressurized oil press to add Press molding; put the formed sagger blank into the nitriding kiln, close the kiln door to vacuumize, and inject nitrogen until the atmosphere...

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PUM

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Abstract

The invention discloses a silicon nitride-silicon carbide-corundum sagger comprising the following components in parts by weight: 70-85 parts of polycrystalline silicon cutting slag, 5-10 parts of aluminum oxide micro powder, 10-20 parts of fused alumina powder, 3-5 parts of a nitriding sintering accelerator and 1-3 parts of polyvinyl alcohol. Meanwhile, the invention also discloses a preparationmethod of the silicon nitride-silicon carbide-corundum sagger. The silicon nitride-silicon carbide-corundum sagger is resistant to corrosion, long in service life and high in saggar strength, the mechanical automatic operation damage rate in the using process is low; in addition, the cost of using the polycrystalline silicon cutting slag is low.

Description

technical field [0001] The invention belongs to the field of refractory materials and relates to comprehensive utilization of secondary resources, in particular to a silicon nitride-silicon carbide-corundum sagger and a preparation method. Background technique [0002] With the improvement of people's requirements for environmental protection, the massive consumption and utilization of non-renewable resources, the dual pressures of energy shortage and environmental protection have greatly promoted the rapid development of the solar photovoltaic industry. The core component of a solar cell is a crystalline silicon wafer, which is currently mainly completed by multi-wire cutting technology. In the multi-wire cutting process, silicon carbide micropowder is used as abrasive and polyethylene glycol is used as a dispersion medium to cut and grind crystalline silicon rods into crystalline silicon wafers. During the chip production process, about 50% of the crystalline silicon ente...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565C04B35/622C04B35/66F27D5/00
Inventor 王家邦
Owner 无锡尚臻新材料有限公司
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