Synthesis and surface properties of submicron barium sulfate particles

► A fabrication process of submicron BaSO4 was presented and their surface chemical composition and bonding were studied. ► The effects of the preparation parameters were investigated. ► pH value has significant effect on the particle size. ► An electrical double layer exists around BaSO4 particle. ► The adsorption of the functional groups of EDTA can shift the isoelectric point of BaSO4 particle to the lower pH level.