Conductive particle and preparation method thereof, conductive adhesive and display device

A method of preparing conductive particles, comprising the steps of:

• forming spherical cores comprising silica;
• dispersing the spherical cores in deionized water and adding organic polymeric monomers so as to form a reaction solution, wherein the organic polymeric monomer is one or more selected from the group consisting of acrylonitrile, 2,3-dimethyl acrylonitrile, 3-phenyl-2-acrylonitrile, and 2-methoxymethyl-3-methoxy acrylonitrile, and a mass ratio of the organic polymeric monomers to the spherical cores ranges from 0.5:1 to 2:1;
• radiating the reaction solution with γ rays so that the organic polymeric monomers are polymerized on surfaces of the spherical cores so as to form organic polymers;
• separating the spherical cores from the reaction solution so as to obtain the spherical cores formed with the organic polymers on their surface;
• and
• carrying out preoxidation and carbonization treatment successively on the spherical cores formed with the organic polymers on their surfaces so that the organic polymers form a conductive layer consisting of carbon particles, thereby obtaining the conductive particles each consisting of the conductive layer and the spherical core.