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Lead-free glass powder for solar cell electronic paste, preparation method and application thereof

A lead-free glass powder and solar cell technology, applied in the field of glass powder for electronic paste, can solve the problems of high cost, high sintering temperature and high softening temperature of glass powder, and achieve low cost of raw materials, lower sintering temperature, and higher viscosity. The effect of knot strength

Active Publication Date: 2015-01-07
JIANGSU RUIDE NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to realize lead-free glass powder for electronic paste, the Chinese patent application number 200810201761.8 discloses a lead-free glass powder prepared from bismuth oxide, boron oxide, zinc oxide, aluminum oxide and silicon oxide as raw materials, but due to The raw material contains Al 2 o 3 , so the sintering temperature of the glass powder is higher and the cost is more expensive; in addition, the Chinese patent application number 200910102949.1 discloses a lead-free glass powder prepared from boron oxide, zinc oxide, bismuth oxide and cordierite ore as raw materials. The lead-free glass powder uses cordierite ore instead of three components of silicon oxide, aluminum oxide and magnesium oxide as raw materials, which reduces the manufacturing cost, but the softening temperature is still high

Method used

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Effect test

Embodiment 1

[0018] The invention is a lead-free glass powder for solar cell electronic paste, which consists of 85% by weight of bismuth oxide, 5% of zinc oxide, 0.5% of boron oxide, 1% of kaolin for glass, 5% of titanium dioxide and It is formulated and processed with 3.5% silica. The softening temperature of the lead-free glass powder is 400-500°C, and the coefficient of linear expansion at 20-300°C is 90-110×10 -7 ℃ -1 , the maximum particle size does not exceed 5 μm, and the median particle size does not exceed 2 μm.

[0019] The present invention also includes a method for preparing the above-mentioned lead-free glass powder and its application. The method comprises the following steps: weighing each raw material component according to the above ratio, fully mixing each raw material component uniformly to make a mixture; heating and melting the mixture in a resistance furnace at 1200° C., and keeping it warm for 1 hour, Obtain molten glass; quickly cool the melted glass in water, ...

Embodiment 2

[0021] The invention is a lead-free glass powder for solar cell electronic paste, which consists of 60% by weight of bismuth oxide, 10% of zinc oxide, 5% of boron oxide, 10% of kaolin for glass, and 10% of carbon dioxide Made of silicon and 5% alumina. The softening temperature of the lead-free glass powder is 400-500°C, and the coefficient of linear expansion at 20-300°C is 90-110×10 -7 ℃ -1 , the maximum particle size does not exceed 5 μm, and the median particle size does not exceed 2 μm.

[0022] The present invention also includes a method for preparing the above-mentioned lead-free glass powder and its application. The method comprises the following steps: weighing each raw material component according to the above ratio, fully mixing each raw material component uniformly to make a mixture; heating and melting the mixture in a resistance furnace at 1400° C., and keeping it warm for 0.5 hours, Obtain molten glass; quickly cool the melted glass in water, take it out and...

Embodiment 3

[0024] The invention is a lead-free glass powder for solar battery electronic paste, which consists of 65% by weight of bismuth oxide, 1% of zinc oxide, 2% of boron oxide, 20% of kaolin for glass, 2% of titanium dioxide and 10% aluminum oxide is formulated and processed. The softening temperature of the lead-free glass powder is 400-500°C, and the coefficient of linear expansion at 20-300°C is 90-110×10 -7 ℃ -1 , the maximum particle size does not exceed 5 μm, and the median particle size does not exceed 2 μm.

[0025] The present invention also includes a method for preparing the above-mentioned lead-free glass powder and its application. The method comprises the following steps: weighing each raw material component according to the above-mentioned ratio, fully mixing each raw material component uniformly to make a mixture; heating and melting the mixture in a resistance furnace at 1800° C., and keeping it warm for 0.5 hours, Obtain molten glass; quickly cool the melted gl...

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Abstract

The invention relates to a lead-free glass powder for solar cell electronic paste, a preparation method thereof and an application thereof. The solar cell electronic paste is formed by preparing and processing the following materials in percentage by weight: 60-85% of bismuth oxide, 1-10% of zinc oxide, 0.5-5% of boric oxide, 1-20% of glass kaolin, 0-5% of titanium dioxide, and 0-10% of silica, wherein the sum in percentage by weight of the components is 100%; the softening point of the prepared glass powder is 400 DEG C to 500 DEG C; the coefficient of linear expansion at 20 DEG C to 300 DEG C is 90-110*10<-7> DEG C<-1>; the maximum particle size does not exceed 5 microns; and the median size does not exceed 2 microns. Compared with the prior art, the lead-free glass powder for the solar cell electronic past has simple material components and low cost. Meanwhile, the obtained glass powder has appropriate softening pint and expansion coefficient, high bonding force, is free of lead and cadmium, satisfies environment-friendly requirements and wide temperature requirements of the sintering process, and is suitable for being used as organic binder in the solar cell electronic paste.

Description

technical field [0001] The invention relates to a glass powder for electronic paste, in particular to a lead-free glass powder for solar cell electronic paste and its preparation method and application. Background technique [0002] A solar cell is a semiconductor device that converts solar energy into electricity. As solar cells are more and more used in various occasions, their market demand is increasing day by day. The impact of such products on the natural environment and people's work and life in the process of production and recycling has also aroused widespread concern in society. focus on. The traditional electronic pastes used to print the front and back electrodes of batteries mostly use leaded glass powder as the inorganic binder. In addition to the large amount of lead volatilized into the air when these glass powders are melted, the lead contained in the glass powders will gradually dissolve during the process of using these glass powders or even after they a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C12/00
Inventor 戈士勇
Owner JIANGSU RUIDE NEW ENERGY TECH
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