Preparation method of aluminum conductive paste of high-performance environment protection solar cell
A technology of solar cells and conductive pastes, applied to conductive materials, circuits, electrical components, etc. dispersed in non-conductive inorganic materials, can solve problems such as environmental pollution, improve photoelectric conversion rate, improve sintering pass rate, bend small effect
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[0020] Example one:
[0021] (1) Preparation of glass powder
[0022] Glass powder by weight percentage Al 2 O 3 10%; SiO 2 25%; V 2 O 2 5%; ZnO 10%; Bi 2 O 3 35%; Sb 2 O 3 5%; Fe 2 O 3 10%, prepared into glass oxide powder; mix the prepared glass powder uniformly, put it into a porcelain crucible, put it into a silicon carbide furnace, and preheat to 500°C for 0.5h at a rate of 30°C / s, and then Raise the temperature to 1300°C at a rate of 80°C / s, smelt for 3 hours, water quench, and dry until the moisture content is less than 5%, then put it in a furnace at 1200°C for 3 hours, water quench, crush and put it into a ball mill to control ZrO 2 Ball: glass powder: deionized water = 2:1:0.5, ball milled to a particle size of 5μm, dried for later use.
[0023] (2) Preparation of inorganic binder glass metal powder
[0024] The weight percentage of 1% indium powder, 2% P 2 O 5 Add to the prepared glass powder, the total amount is 100%, after uniformly mixing, use a pulverizer with a s...
Example Embodiment
[0030] Example 2:
[0031] (1) Preparation of glass powder
[0032] Glass powder by weight percentage Al 2 O 3 8%; SiO 2 40%; V 2 O 2 2%; NiO 1%; ZnO 6%; Bi 2 O 3 32%; Sb 2 O 3 4%; Cr 2 O 3 1%; Fe 2 O 3 6%, uniformly mixed, prepare glass powder, inorganic binder glass metal powder and organic carrier according to the process of Example 1.
[0033] (2) Preparation of aluminum conductive paste
[0034] Mix 80% by weight of aluminum powder wrapped in aluminum nitride, 13% of organic carrier, 4% of inorganic binder glass metal powder, and 3% of 2-5μmC powder, and then grind with a three-roller The particle size reaches 15-30μm, and the product with a viscosity of 28000mpa·s is obtained.
[0035] The slurry has been tested and its performance meets the performance requirements of the present invention.
Example Embodiment
[0036] Embodiment three:
[0037] (1) Preparation of glass powder
[0038] Glass powder by weight percentage Al 2 O 3 15%; SiO 2 20%; V 2 O 2 1%; NiO 3%; ZnO 8%; Bi 2 O 3 40%; Sb 2 O 3 6%; Cr 2 O 3 2%; Fe 2 O 3 5%, uniformly mixed, prepare glass powder, inorganic binder glass metal powder and organic carrier according to the process of Example 1.
[0039] (2) Preparation of aluminum conductive paste
[0040] Mix 85% by weight of aluminum powder coated with aluminum nitride, 9% of organic carrier, 5% of inorganic binder glass metal powder, 1% of 2-5μm C powder, and then use three rolls Machine grinding to a particle size of 15-30μm, and obtain a product with a viscosity of about 35000mpa·s.
[0041] The slurry has been tested and its performance meets the performance requirements of the present invention.
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