High-temperature-resistant and high-humidity-resistant low-temperature halogen-free conductive silver paste and preparation method thereof

The invention relates to the field of conductive paste, in particular to high-temperature-resistant and high-humidity-resistant low-temperature halogen-free conductive silver paste and a preparation method thereof.The preparation method comprises the following steps that macromolecule resin and a solvent are taken to be stirred in a dissolving kettle to be transparent, then a screen is used for filtering and impurity removal, and a carrier is obtained; the preparation method comprises the following steps: putting metal silver powder, a carrier, a thixotropic agent, an adhesion promoter, a hardening agent and a dispersing agent into a high-speed dispersion machine for high-speed dispersion to obtain uniform slurry; and grinding and dispersing the paste in a three-roller mill, adjusting the distance between rollers, and adjusting the fineness and viscosity of the silver paste to prepare the high-temperature-resistant and high-humidity-resistant low-temperature halogen-free conductive silver paste. Compared with