Quartz tube automatic control feeding production method and device for semiconductor photovoltaics

A production method and technology of production equipment, applied in the field of quartz tube production, can solve the problems of partial wall of quartz tube, uneven pressure, uneven distribution of quartz sand raw materials, etc., and achieve the effect of improving light transmittance and qualification rate

Pending Publication Date: 2018-06-29
FUDONG LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Quartz tubes for semiconductor photovoltaics have high requirements on the quality of the tubes, requiring high wall uniformity, no bubbles, gas lines, and colorless lines. The requirements for light transmission performance are particularly strict. Generally, the light transmittance of quartz tubes is required to be above 92%. , and in the existing quartz continuous melting pipe drawing equipment, the angle of repose of the quartz sand is generally used to control the falling of the quartz sand, and the intermittent drop makes it difficult to ensure the stability of the quartz molten liquid level, causing uneven pressure at the liquid level, and not Good for air bubbles to escape
During the feeding process, it is easy to form material piles and caps, resulting in uneven distribution of quartz sand raw materials in the furnace. Excessive accumulation of sand particles will easily cause gas to be wrapped by quartz melt, forming gas lines and bubbles. The pressure of the quartz liquid surface in the furnace is uneven, and the quartz material is discharged The molding is affected, causing the quartz tube to deviate from the wall and have too many gas lines
Therefore, the quartz tubes for semiconductor photovoltaics produced by existing equipment have poor light transmittance, high scrap rate, and high cost.

Method used

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  • Quartz tube automatic control feeding production method and device for semiconductor photovoltaics

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Experimental program
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Effect test

Embodiment 1

[0027] The described production method of automatic control feeding of quartz tubes for semiconductor photovoltaics comprises the following steps:

[0028] (1) Quartz sand purification treatment:

[0029] After crushing the quartz sand, take the quartz sand particles with a D50 value of 150 μm. After washing the mud with water, the quartz sand and deionized water are prepared into a slurry at a mass ratio of 1:1.2.

[0030] Add sulfuric acid with a mass fraction of 15% to the slurry, stir and soak for 2 hours, then send the material to a filter press for dehydration, wherein the volume ratio of sulfuric acid to slurry is 1:0.8; the dehydrated quartz sand and Make slurry with deionized water according to the mass ratio of 1:1.8, adjust the slurry to neutral with ammonia water, then add 0.3% EDTA of quartz sand quality to the slurry, stir and mix for 1 hour, dehydrate, and rinse with deionized water to neutral and tumble dry.

[0031] Put the dried quartz sand into a chlorinat...

Embodiment 2

[0036] The described production method of automatic control feeding of quartz tubes for semiconductor photovoltaics comprises the following steps:

[0037] (1) Quartz sand purification treatment:

[0038] After crushing the quartz sand, take the quartz sand particles with a D50 value of 150 μm. After the mud is washed out with water, the quartz sand and deionized water are prepared into a slurry at a mass ratio of 1:1.5.

[0039] Adding sulfuric acid with a mass fraction of 22% in the slurry, stirring and soaking for 3 hours, the material is sent to a filter press for dehydration, wherein the volume ratio of sulfuric acid and slurry is 1:1.2; the dehydrated quartz sand and Make slurry with deionized water at a mass ratio of 1:2.2, adjust the slurry to neutral with ammonia water, then add 0.8% EDTA of quartz sand quality to the slurry, stir and mix for 2 hours, dehydrate, and rinse with deionized water to neutral and tumble dry.

[0040] Put the dried quartz sand into a chlor...

Embodiment 3

[0045] The described production method of automatic control feeding of quartz tubes for semiconductor photovoltaics comprises the following steps:

[0046] (1) Quartz sand purification treatment:

[0047] After the quartz sand is crushed, the quartz sand particles with a D50 value of 150 μm are taken. After the mud is washed out with water, the quartz sand and deionized water are made into a slurry at a mass ratio of 1:1.3.

[0048] Add sulfuric acid with a mass fraction of 18% to the slurry, stir and soak for 2.5 hours, then send the material to a filter press for dehydration, wherein the volume ratio of sulfuric acid and slurry is 1:1; the dehydrated quartz sand and Make slurry with deionized water at a mass ratio of 1:2, adjust the slurry to neutral with ammonia water, then add 0.5% EDTA of quartz sand mass to the slurry, stir and mix for 1.5 hours, dehydrate, and rinse with deionized water to neutral and tumble dry.

[0049] Put the dried quartz sand into a chlorination fu...

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Abstract

The invention discloses a quartz tube automatic control feeding production method and device for semiconductor photovoltaics, and belongs to the technical field of quartz tube production. The problemsthat a quartz tube produced by the prior art has poor light transmittance and a low qualification rate are solved. The method comprises the following steps: (1) physically purifying, chemically purifying and chlorinating quartz sand; (2) adding the purified quartz sand to a quartz tube automatic control feeding device for semiconductor photovoltaics to produce a quartz tube for semiconductor photovoltaics. The production device comprises a furnace cover, a furnace body and a crucible, wherein a heating and heat preservation device is arranged between the furnace body and the crucible, the furnace cover is provided with two or more feeding ports, the feeding ports are connected with an automatic feeding control system, and the furnace cover is also provided with a liquid level detecting system, a production measuring instrument is arranged at an outlet of the quartz tube below the furnace body, and the liquid level detecting system and the production measuring instrument are correspondingly connected with the automatic feeding control system. The quartz tube automatic control feeding production method and device for the semiconductor photovoltaics can be used for producing the quartz tube for the semiconductor photovoltaics.

Description

technical field [0001] The invention relates to a production method and equipment for automatically controlling feeding of quartz tubes for semiconductor photovoltaics, and belongs to the technical field of quartz tube production. Background technique [0002] Quartz glass tube is a special industrial technical glass made of silica, which has a series of excellent physical and chemical properties such as high temperature resistance, corrosion resistance, good thermal stability, good light transmission performance, and good electrical insulation. Widely used in electric light source, semiconductor, optical communication, military industry, metallurgy, building materials, chemistry, machinery, electric power, environmental protection and other fields. [0003] Quartz tubes for semiconductor photovoltaics have high requirements on the quality of the tubes, requiring high wall uniformity, no bubbles, gas lines, and colorless lines. The requirements for light transmission perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B20/00C03B3/00
CPCC03B3/00
Inventor 庞海涛濮阳坤陶明顿张尧
Owner FUDONG LIGHTING
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