The Application of High-Pressure Homogenizers in Conductive Silver Paste for Photovoltaic Cells

In the photovoltaic industry, silver paste is a crucial raw material. The particle size of the silver paste and the uniformity of the mixed materials greatly affect the forming effect and conductivity after coating.

The processing of photovoltaic silver paste typically involves three stages: mixing with a planetary mixer, high-pressure homogenization, and processing through a three-roll mill.

The processing of photovoltaic silver paste with a high-pressure homogenizer can address the issue of insufficiently uniform material mixing after treatment by a planetary mixer. Additionally, the particle size of the conductive silver paste can be further refined after processing through the high-pressure homogenizer, facilitating subsequent processing by the three-roll mill.

However, due to the high solid content in photovoltaic silver paste, the fluid has poor viscosity and fluidity. Using a high-pressure homogenizer alone would result in cavitation, preventing normal production.

Juheng Fluid Technology has designed a pretreatment process, incorporating water bath heating to reduce viscosity and enhance fluidity. The addition of plunger pumps converts the passive suction of silver paste into active pressure injection, resolving the air suction issue when using a high-pressure homogenizer alone.