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A kind of hypoxic spraying method

A coating and adhesive technology, applied in the field of low-oxygen spraying, can solve the problems of high oxygen content, poor compactness and high oxygen content of silicon ingots in the spray coating, and achieve the effect of enhancing light decay and reducing oxygen content.

Active Publication Date: 2017-12-29
JINKO SOLAR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the above-mentioned heating spraying process, due to the high oxygen content in the silicon dioxide of the silica sol, the resulting sprayed coating has a high oxygen content and poor compactness. Diffusion in the ingot, resulting in high oxygen content in the silicon ingot, which reduces the light decay effect of the cell

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  • A kind of hypoxic spraying method
  • A kind of hypoxic spraying method

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Embodiment Construction

[0021] The core idea of ​​the present invention is to provide a low-oxygen spraying method to reduce the oxygen content in the sprayed layer, so as to reduce the oxygen content in the silicon ingot and enhance the light attenuation effect of the cell.

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] A kind of low-oxygen spraying method provided by the embodiment of the present application is as follows: figure 1 as shown, figure 1 It is a schematic diagram of a low-oxygen spraying method provided i...

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Abstract

The application discloses a low-oxygen spraying method, comprising: using ceramic viscose and silica sol to make an adhesive, the weight of the ceramic viscose in the adhesive is greater than the weight of the silica sol; mixing with silicon nitride powder, adding the binder, and stirring to obtain a prepared coating; using purified compressed air to spray the coating on the inner wall of the crucible. The above-mentioned low-oxygen spraying method that the application provides, owing to utilize vitrified viscose and silica sol to make adhesive, the weight of described vitrified viscose in described adhesive is greater than the weight of described silica sol, therefore can reduce spray coating In order to reduce the oxygen content in the silicon ingot and enhance the light attenuation effect of the cell.

Description

technical field [0001] The invention relates to the field of photovoltaic technology, in particular to a low-oxygen spraying method. Background technique [0002] The competition of polycrystalline technology is actually the competition of silicon ingot quality. Thermal spraying is an important step in the manufacture of silicon ingots. [0003] The current heating spray process uses silicon nitride, water, silica sol, and ceramic binders. One process is: mix 1800ml of pure water and 600g of silicon nitride powder evenly, add 200ml of silica sol and 5g of ceramic binder while stirring continuously, and stir for a few minutes, then use purified silicon liquid coating Compressed air for spraying, gun pressure of 20psi-40psi, spraying distance of 25cm-30cm, positioning landing crucible width of 15-20cm, spraying thickness of about 0.01mm, crucible spraying temperature of 45-60°C, and then sintering . [0004] However, in the above-mentioned heating spraying process, due to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B33/00C30B29/06
Inventor 陈伟李亮肖贵云李林东黄晶晶闫灯周金浩
Owner JINKO SOLAR CO LTD