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A kind of lead-free glass powder based on graphene modification and its preparation method and electronic paste

A graphene and glass powder technology, applied in the field of crystalline silicon solar cell conductive paste, can solve problems such as lead toxicity and environmental protection, and achieve the effects of improving current convergence and exporting effects, mild conditions, and improving dispersibility

Active Publication Date: 2020-01-10
NORTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Graphene materials have excellent material properties in terms of conductivity, mechanics, electricity, and optics, as well as good dispersion in certain solvent matrices, especially their two-dimensional network structure is very easy to fill in the gaps between glass powders , and can form a good bond with the silicon substrate, so the application of graphene to modify the glass powder to improve the dispersion of the glass powder belongs to the new development of graphene in the preparation of high-dispersion glass powder and high-performance electronic paste. Application thinking, there is no such preparation technology of highly dispersed glass powder based on graphene modification in the prior art
At the same time, solar energy is a kind of clean energy that has attracted much attention, but the conductive paste used in existing silicon-based solar cells is based on lead paste, and the toxicity of lead is also very unfavorable for environmental protection. Powder, especially the dispersion performance of lead-free glass powder, is of far-reaching significance to promote the utilization of solar clean energy.

Method used

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  • A kind of lead-free glass powder based on graphene modification and its preparation method and electronic paste
  • A kind of lead-free glass powder based on graphene modification and its preparation method and electronic paste
  • A kind of lead-free glass powder based on graphene modification and its preparation method and electronic paste

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preparation example Construction

[0030] First provide the preparation method of the highly dispersed lead-free glass powder modified by graphene of the present invention, specifically comprise the following steps:

[0031] Step 1, preparation of lead-free glass powder:

[0032] (1) First accurately weigh each oxide with an analytical balance, and its composition and weight percentage are: 30-55% Bi 2 o 3 , 10~35%TeO 2 , 5-15% ZnO, 3-5% MgO, 5-15% SiO 2 , 2~4%P 2 o 5 , 5 ~ 15% B 2 o 3 , 1~12%Al 2 o 3 , further preferably including oxide V with a weight percentage content of 0-5% 2 o 5 , CaO, SnO 2 At least one of the oxides, the total percentage content of each oxide is 100%;

[0033] (2) Prepare the required glass powder by melting and quenching, mix the above-mentioned oxides evenly and place them in an aluminum crucible, and then place the aluminum crucible in a high-temperature electric furnace at a set temperature (about 1200°C) for 10- After 50 minutes, take it out and quench it in distilled...

Embodiment 1

[0056] A preparation method of lead-free glass powder, comprising:

[0057] Take the following substances by weight percentage: 30% Bi 2 o 3 , 35% TeO 2 , 15% ZnO, 3% MgO, 5% SiO 2 , 2%P 2 o 5 , 5% B 2 o 3 , 5% Al 2 o 3 , then mix the above weighed oxides evenly and place them in an aluminum crucible, then place the aluminum crucible in a high-temperature electric furnace at about 1200 ° C for 10 minutes, take it out and quench it in distilled water to room temperature to obtain coarse glass powder, then A jet mill was used to pulverize the coarse glass powder to a particle size of 3-5 μm, and the lead-free glass powder sample was obtained after washing and drying.

Embodiment 2

[0059] A preparation method of lead-free glass powder, comprising:

[0060] Weigh the following substances by weight percentage: 55% Bi 2 o 3 , 10% TeO 2 , 5% ZnO, 3% MgO, 5% SiO 2 , 2%P 2 o 5 , 10% B 2 o 3 , 10% Al 2 o 3 , then mix the above weighed oxides evenly and place them in an aluminum crucible, then place the aluminum crucible in a high-temperature electric furnace at about 1200°C for 50 minutes of melting, then take it out and quench it in distilled water to room temperature to obtain coarse glass powder, then A jet mill is used to pulverize the coarse glass powder to a particle size of 3-5 μm, and the lead-free glass powder sample is obtained after washing and drying.

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Abstract

The present invention proposes a lead-free glass powder based on graphene modification and its preparation method and electronic paste, by modifying graphene or modified graphene on the surface of the glass powder through adsorption and bonding to obtain a graphene-based modified glass powder Glass powder, wherein the number of layers of graphene or modified graphene is between 1-100 layers. The invention is the first to apply graphene to the modification of lead-free glass powder. The process is simple and the conditions are mild. The prepared glass powder has a high degree of functionalization and good dispersibility. When it is applied to the preparation of electronic paste, it improves The dispersibility of silver particles and its electrical conductivity, slurry volatility, leveling and thixotropy and other properties, and then improve the current convergence and derivation effect of the solar cell electrode prepared by electronic slurry, so the present invention proposes the use of graphene in solar energy The new idea of ​​application in the preparation of battery slurry has broad market promotion prospects.

Description

technical field [0001] The invention relates to the technical field of powder materials, in particular to a graphene-modified glass powder and a preparation method thereof, in particular to a graphene-modified high-dispersion lead-free glass powder and a preparation method thereof, and based on the above-mentioned lead-free glass powder The electronic paste and the preparation method thereof can be widely applied to the conductive paste of crystalline silicon solar cells. Background technique [0002] With the development of new energy technology, the application and research of solar cells has gradually become a hot spot in new energy batteries. The electrode preparation of solar cells requires the use of electronic paste, and the composition and structure of the electronic paste directly affect the current convergence and export effect of the prepared battery electrode, and then affect its electrical properties. Graphene materials have excellent material properties in ter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C12/00H01B1/22H01L31/0224
CPCC03C12/00H01B1/22H01L31/022425Y02E10/50
Inventor 王惠白晋涛马倩马生华
Owner NORTHWEST UNIV
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