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Lead-free glass powder and preparation method thereof

A technology of lead-free glass powder and glass powder, which is applied in the field of lead-free glass powder and its preparation, solar cell front electronic paste, can solve the problems of high softening temperature and high melting temperature of lead-free glass powder, and achieve good electrical conductivity, The effect of stable chemical properties and dense conductive network

Inactive Publication Date: 2012-10-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a lead-free glass powder, which solves the problems of high softening temperature and high melting temperature of the lead-free glass powder in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: the specific composition of the lead-free glass powder prepared by the present invention is: Bi 2 o 3 35%, B 2 o 3 30%, SiO 2 2.5%, Al 2 o 3 10%, ZnO 8%, TiO 2 2%, MgO 4%, NaF 1%, MnO 2 3%, SnO 2 2%, SrCl 2 1%.

[0025] The preparation method of lead-free glass powder of the present invention is as follows:

[0026] (1) Mix ingredients according to the composition and mass percentage of the above-mentioned lead-free glass powder, heat and keep warm to fully melt the mixture into glass liquid; the heating rate is from room temperature to 5°C / min before 800°C, and after 800°C The heating rate is 3°C / min to 1100°C for 120 minutes.

[0027] (2) Pour the glass liquid into deionized water and quench it to make it cool rapidly to form glass particles;

[0028] (3) The glass particles are ball-milled into glass powder with a particle size of 1 μm to 2 μm to obtain lead-free glass powder for solar cell front electronic paste.

[0029] The softe...

Embodiment 2

[0030] Embodiment 2: the specific composition of the lead-free glass powder prepared by the present invention is: Bi 2 o 3 50%, B 2 o 3 10%, SiO 2 10%, Al 2 o 3 8%, ZnO 6%, TiO 2 1%, MgO 1%, NaF 3%, MnO 2 2%, SnO 2 1%.

[0031] The preparation method of lead-free glass powder of the present invention is as follows:

[0032] (1) Mix the ingredients according to the composition and mass percentage of the above-mentioned lead-free glass powder, heat and keep warm to fully melt the mixture into glass liquid; the heating rate is from room temperature to 6 °C / min before 800 °C, and after 800 °C The heating rate is 4°C / min to 1200°C for 60 minutes.

[0033] (2) Pour the glass liquid into deionized water and quench it to make it cool rapidly to form glass particles;

[0034] (3) The glass particles are ball-milled into glass powder with a particle size of 3 μm to 5 μm to obtain the lead-free glass powder for the front electronic paste of the solar cell.

[0035] The...

Embodiment 3

[0036] Embodiment 3: the specific composition of the lead-free glass powder prepared by the present invention is: Bi 2 o 3 30%, B 2 o 3 40%, SiO 2 1%, Al 2 o 3 3%, ZnO 5%, TiO 2 5%, MgO 5%, NaF 2%, MnO 2 1%, SnO 2 4%, SrCl 2 2%.

[0037] The preparation method of lead-free glass powder of the present invention is as follows:

[0038](1) Mix the ingredients according to the composition and mass percentage of the above-mentioned lead-free glass powder, heat and keep warm to fully melt the mixture into glass liquid; the heating rate is from room temperature to 8 °C / min before 800 °C, and after 800 °C The heating rate is 5°C / min to 1300°C for 80 minutes.

[0039] (2) Pour the glass liquid into deionized water and quench it to make it cool rapidly to form glass particles;

[0040] (3) The glass particles are ball-milled into glass powder with a particle size of 2 μm to 4 μm to obtain the lead-free glass powder for the front electronic paste of the solar cell.

...

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Abstract

The invention provides lead-free glass powder and a preparation method thereof, and belongs to the fields of glass powder and solar cell. The lead-free glass powder comprises the following constituents by mass percent: 30-50% of Bi2O3 (bismuth oxide), 10-40% of B2O3, 1-10% of SiO2 (silica), 3-10% of Al2O3 (aluminum oxide), 5-8% of ZnO (zinc oxide), 2-5% of TiO2 (titanium dioxide), 1-5% of MgO (magnesium oxide), 1-3% of NaF (sodium fluoride), 1-3% of MnO2 (manganese dioxide), 1-4% of SnO2 (stannic oxide) and 0-2% of SrCl2 (strontium chloride). Mixture of ingredients of the lead-free glass powder is heated, preserved, fused and quenched by water, and then ball-milled to prepare the lead-free glass powder finally. The lead-free glass powder with low softening temperature, stable chemical property, proper expansion coefficient and wide sintering temperature range is finally prepared by the method disclosed by the invention.

Description

technical field [0001] The invention relates to a lead-free glass powder and a preparation method thereof, in particular to the front electronic paste of solar cells, and belongs to the field of glass powder and solar cells. Background technique [0002] With the rapid development of the global economy, energy consumption is increasing at an alarming rate, and the world's proven storage and mining of major fossil fuels are not optimistic. Therefore, the development and utilization of new energy has become an urgent priority. This is also providing a very broad market for the development and utilization of new energy. The solar cell industry is occupying a major share of the market with its strong advantages and prospects. At present, the solar cell market is mainly dominated by silicon solar cells. [0003] In the preparation process of silicon solar cells, the silver conductive paste is printed on the silicon substrate coated with anti-reflection film to form a grid, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00
Inventor 甘国友张子楠严继康杜景红高兴
Owner KUNMING UNIV OF SCI & TECH
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