Lead-free glass powder for solar batteries and pure silver paste
A technology of lead-free glass powder and solar cells, which is applied to conductive materials dispersed in non-conductive inorganic materials, circuits, photovoltaic power generation, etc. It can solve the problems of lowering the melting temperature of glass, failure to achieve good bonding, and low surface activity. , to achieve the effect of reducing thermal expansion coefficient, promoting stability and good dispersion
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[0031] According to the present invention, the preparation method of lead-free glass powder for solar cell of the present invention comprises the following steps:
[0032] (1) Ball mill all the raw materials and pass through a 200-mesh sieve to fully mix the raw materials evenly and reduce the particle size of the raw materials;
[0033] (2) Melt the ground raw materials at 800°C-1200°C for 60-90 minutes, and then keep them warm for 20-30 minutes at a temperature of 950°C-1200°C to obtain a uniform and clear glass melt;
[0034] (3) Quenching the molten glass in deionized water, and obtaining glass particles after cooling;
[0035] (4) Coarsely grind the glass particles by wet method: add deionized water into the ball mill and use zirconium balls with a diameter of 10-25mm for ball milling, the ball milling time is 2-5h, and then use zirconium balls with a diameter of 2-3mm Ball milling, the ball milling time is 2-4h, to obtain glass powder;
[0036] (5) Put the glass powder...
Embodiment 1
[0045] A lead-free glass powder for solar cells, the softening temperature of the lead-free glass powder is 430 ° C, the average particle size is 0.7 μm, the lead-free glass powder includes 52 parts of bismuth oxide, 2 parts of antimony oxide, 3 parts of zinc oxide 1 part, 4 parts of boric acid, 5 parts of silicon oxide, 1 part of rhenium oxide, 0.5 part of strontium oxide;
[0046] The lead-free glass powder also contains barium oxide with a content of 0.6% of the total weight of the glass powder;
[0047] The preparation method of described lead-free glass powder comprises the following steps:
[0048] (1) Ball mill all the raw materials and pass through a 200-mesh sieve to fully mix the raw materials evenly and reduce the particle size of the raw materials;
[0049] (2) Melt the ground raw material at 900°C for 60 minutes, and then keep it at 1000°C for 30 minutes to obtain a uniform and clear glass melt;
[0050] (3) Quenching the molten glass in deionized water, and obt...
Embodiment 2
[0056] A lead-free glass powder for solar cells, the softening temperature of the lead-free glass powder is 450 ° C, the average particle size is 0.9 μm, the lead-free glass powder includes 59 parts of bismuth oxide, 4 parts of antimony oxide, 5 parts of zinc oxide 4 parts of boric acid, 6 parts of silicon oxide, 2 parts of rhenium oxide, 1 part of strontium oxide;
[0057] The lead-free glass powder also contains barium oxide with a content of 0.8% of the total weight of the glass powder, and a lanthanide metal oxide with a content of 0.3% of the total weight of the glass powder;
[0058] The preparation method of described lead-free glass powder comprises the following steps:
[0059] (1) Ball mill all the raw materials and pass through a 200-mesh sieve to fully mix the raw materials evenly and reduce the particle size of the raw materials;
[0060] (2) Melt the ground raw material at 900°C for 70 minutes, and then keep it at 980°C for 20 minutes to obtain a uniform and cle...
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