The invention belongs to the technical field of
conductive materials and solar cells, and relates to a preparation method and application of main grid
slurry of high-
conductivity silver coated conductive
powder, and the preparation method comprises the following steps: mixing a part of an organic carrier and inorganic glass
powder which accounts for 65-90%, stirring until no obvious granular
sensation exists and the measured
fineness is below 50 [mu] m to obtain a main grid
slurry; transferring to a three-roller
machine, and rolling until the
fineness is less than or equal to 3 microns; and mixing the residual organic carrier with the glass
slurry, the silver-coated conductive
powder and the silver powder, stirring until no obvious granular
sensation exists and the measured
fineness is below 10 microns, transferring to a three-roller
machine, and rolling until the fineness is less than or equal to 3 microns to obtain the main grid slurry. According to the preparation method disclosed by the invention, by regulating and controlling the compounding ratio of the organic carrier, the inorganic glass powder, the silver-coated conductive powder and the silver powder, the printability, the
conductivity, the tensile force and other properties of the paste are adjusted, so that the overall performance of the paste is enhanced.