▎ 摘　　要

NOVELTY - The method involves forming the graphitized structure under argon gas, high temperature conditions, and catalytic action by carbon source precursor. The graphitized structural material oxidized to form nanometre oxidized graphite. The nano-graphene material is formed by annealing the nano-graphite oxide. The conductivity is improved by further high temperature treatment. The nano-graphene material is mixed with the additive and dissolving in water. The ball milling and ultrasonic dispersion treatment is performed. USE - Method for preparing high-conductivity nanometer graphene colloid useful in the field of printed circuit board. ADVANTAGE - The method: enables to prepare high-conductivity nanometer graphene colloid that has outstanding performance, good conductivity, long service life; and can replace other carbon-based hole metallization colloid or solution applied on the printed circuit board. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an application of the high-conductivity nanometer graphene colloid.