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Lead-free glass powder, preparation method thereof, silver paste containing glass powder and crystal silicon solar cell manufactured by using silver paste

A technology of lead-free glass powder and silver paste, applied in the direction of conductive materials, circuits, electrical components, etc. dispersed in non-conductive inorganic materials, can solve the problems of large particle size of glass powder, complex raw materials, high melting temperature, etc. Achieve the effect of low softening temperature, simple preparation process and high adhesion

Inactive Publication Date: 2011-07-20
湖南威能新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a lead-free glass powder and its The preparation method, the silver paste containing the glass powder and the crystalline silicon solar cell manufactured by using the silver paste, the composition and raw materials of the lead-free glass powder are simple, the melting temperature is low, the softening temperature is low, and the particle size of the glass powder is fine. The performance of the silver paste is excellent, and the crystalline silicon solar cells manufactured with the silver paste have high photoelectric conversion efficiency

Method used

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  • Lead-free glass powder, preparation method thereof, silver paste containing glass powder and crystal silicon solar cell manufactured by using silver paste
  • Lead-free glass powder, preparation method thereof, silver paste containing glass powder and crystal silicon solar cell manufactured by using silver paste
  • Lead-free glass powder, preparation method thereof, silver paste containing glass powder and crystal silicon solar cell manufactured by using silver paste

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preparation example Construction

[0031]The preparation method of the lead-free glass powder comprises the following steps: (1) weighing each component raw material according to the weight percentage to prepare a mixture; (2) heating and melting the mixture; (3) water quenching the melted glass liquid; 4) drying the water-quenched glass frit; (5) crushing the dried water-quenched glass frit into powder; (6) sieving and controlling the particle size of the glass powder to an ultrafine glass powder of 0.5-5 μm. Finally, the linear expansion coefficient and softening point of the glass frit were measured. Melting the mixture in step (2) is to put the mixture into a crucible and heat and melt in an electric furnace. The crucible is a corundum crucible, and the melting temperature is 1100-1300° C. for 10-30 minutes. In step (5), the dried water-tempered glass frit is pulverized into powder by a planetary ball milling method.

[0032] The silver paste containing the above-mentioned lead-free glass powder is obtain...

Embodiment 1

[0036] Batch 100g according to the formula of Example 1 in Table 1, and mix evenly, put the mixture into a corundum crucible, then heat and melt the corundum crucible in an electric furnace at a melting temperature of 1250°C and keep it warm for 10 minutes. The melted glass liquid is immediately poured into water for quenching, dried, and the glass frit is crushed into powder by planetary ball milling method, and sieved to obtain ultrafine glass powder with a particle size of 0.5-5 μm or less. The SEM scanning electron microscope picture of the prepared glass powder is as follows: figure 1 As shown, the figure proves that the particle size of the prepared glass powder is within the required range of 5 μm or less. After testing, the softening temperature of the lead-free glass powder is 444°C and the coefficient of linear expansion is 90×10 -7 ℃ -1 (See Table 1), compared with the softening temperature of the lead-free glass powder mentioned in CN101215091A in the background ...

Embodiment 2

[0038] Mix 100 g according to the formula of Example 2 in Table 1, and mix evenly. Put the mixture into a corundum crucible, and then heat and melt the corundum crucible in an electric furnace at a melting temperature of 1260° C. for 15 minutes. The melted glass liquid is immediately poured into water for quenching, dried, and the glass frit is crushed into powder by planetary ball milling method, and sieved to obtain ultrafine glass powder with a particle size of 0.5-5 μm or less. The SEM scanning electron micrograph of the prepared glass powder and figure 1 It is similar, so it is omitted to prove that the particle size of the prepared glass powder is within the required range of 5 μm or less. After testing, the softening temperature of the lead-free glass powder is 458°C and the coefficient of linear expansion is 86×10 -7 ℃ -1 (See Table 1), compared with the softening temperature of the lead-free glass powder mentioned in CN101215091A in the background technology up to 5...

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Abstract

The invention discloses lead-free glass powder, a preparation method thereof, silver paste containing the glass powder and a crystal silicon solar cell manufactured by using the silver paste. The lead-free glass powder comprises the following components in percentage by weight: 20-30 percent of SiO2, 2-15 percent of B2O3, 40-70 percent of Bi2O3, 1-10 percent of ZnO, 1-10 percent of Al2O3 and 1-5 percent of BaO. The preparation method comprises the following steps of: (1) weighing the components for preparing a mixture; (2) putting the mixture into a crucible for melting; (3) performing water quenching on molten glass; (4) drying; (5) smashing the mixture into powder by planetary ball milling; and (6) screening. The needed silver paste is prepared from the lead-free glass powder, silver powder, an additive and an organic carrier. A solar panel front face electrode and a grid line are manufactured by performing screen printing and sintering on conductive silver paste on a cell substrate, so that the needed solar cell is obtained. The lead-free glass powder has low melting temperature, low softening temperature and low linear expansion factor.

Description

technical field [0001] The invention relates to a lead-free glass powder and a preparation method thereof, silver paste containing the glass powder and a crystalline silicon solar cell manufactured with the silver paste, specifically a front electrode and a grid line of a crystalline silicon solar cell Inorganic binder for conductive silver paste, i.e. lead-free ultra-fine glass powder for front silver paste of crystalline silicon solar cells, preparation method thereof, front silver paste containing the glass powder, and front silver paste made of the same Crystalline silicon solar cells. Background technique [0002] Solar energy is a kind of green energy. People pay more and more attention to it because of its advantages of no pollution, inexhaustibility, and no limitation of geographical resources. Therefore, solar cells have emerged as the times require. A crystalline silicon solar cell is a semiconductor device that can convert solar energy into electrical energy. Und...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00H01L31/0224H01B1/22
Inventor 周华张金玲刘继宇张海旺甘卫平郭桂全向锋甘景豪
Owner 湖南威能新材料科技有限公司
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