Silver paste for environmental-friendly lead-free silicon solar cell front electrode and preparation method of silver paste
A technology of solar cells and crystalline silicon, applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve problems affecting the uniformity of silver powder, increasing contact resistance, and screen printing cracks , to achieve good economic benefits, reduce shrinkage, and high yield
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Embodiment 1
[0034] (1) Preparation of glass powder A
[0035] Get the raw material of following weight portion: Bi 2 o 3 20 parts, SiO 2 15 copies, B 2 o 3 10 parts, Al 2 o 3 6 parts, CaO 4 parts, Co 2 o 3 3 parts, AgO 2 2 parts, mixed evenly, placed in a high-temperature muffle furnace at 1100°C for sintering, kept for 40 minutes, then quenched with deionized water, ground, passed through a 250-mesh sieve, cooled, and kept at -700°C for 5 hours, and then used Quenching with deionized water, grinding, passing through sieves of different meshes, collecting 3 μm glass powder, 10 μm glass powder and 20 μm glass powder respectively, soaking them in 25% hydrochloric acid for 2 hours, and then washing them with deionized water until neutral. drying spare;
[0036] (2) Preparation of glass powder B
[0037] Get the following raw materials in parts by weight: SiO 2 15 copies, B 2 o 3 8 parts, TiO 2 6 copies, V 2 o 5 4 parts, BaO4 parts, Al 2 o 3 3 parts, AgO 2 2 p...
Embodiment 2
[0054] (1) Preparation of glass powder A
[0055] Get the raw material of following weight portion: Bi 2 o 3 30 parts, SiO 2 15 copies, B 2 o 3 8 parts, Al 2 o 3 8 parts, CaO 4 parts, Co 2 o 3 4 parts, AgO 2 3 parts, mixed evenly, placed in a high-temperature muffle furnace at 1200°C for sintering, kept for 50 minutes, quenched with deionized water, ground, passed through a 250-mesh sieve, cooled, and kept at 700°C for 6 hours, and then used Quenching with deionized water, grinding, passing through sieves of different meshes, collecting 4μm glass powder, 12μm glass powder and 24μm glass powder respectively, soaking in 25% hydrochloric acid for 2 hours, and then washing with deionized water until neutral, drying spare;
[0056] (2) Preparation of glass powder B
[0057] Get the following raw materials in parts by weight: SiO 2 20 copies, B 2 o 3 10 parts, TiO 2 5 copies, V 2 o 5 5 parts, BaO 5 parts, Al 2 o 3 3 parts, AgO 2 2 parts, mixed eve...
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