Large scale and environmentally friendly preparation of micro-submicron spherical silica and their surface effect in resin materials

Amorphous micro-submicron spherical silica powders with different particle sizes and surface properties were prepared by turbulent flow cycle method and characterized by inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MASS), X-ray diffraction (XRD), particle size distribution (PSD), specific surface area (SSA) analysis and scanning electron microscopy (SEM). The effects of particle size and surface property of different spherical silica on the fluidity of resin materials were conducted. The result showed that the spherical silica with the characterization of D-50 = 2.5 mu m and the ratio of experimental specific surface area and calculated specific surface area is 2.38, played a better role in the flow ability of epoxy materials. So it may be a better choice for the preparation of epoxy materials used in IC packaging area and other high-tech fields. (C) 2011 Elsevier B.V. All rights reserved.