A Novel Method for Preparation of High Strength Hollow Spherical Silicon Dioxide By Plasma Technology

Although some conventional technologies can gain hollow spherical silica, such as chemical precipitation method, burning method or template method, the hollow spherical silica prepared by these methods of the above-mentioned preparation technologies generally has higher density and lower compressive strength, so the hollow spherical silica cannot meet the requirement of some special field. In this paper a novel method by plasma technology to prepare high performance hollow spherical silica was proposed, and the relationship between the technological parameters of plasma and hollow spherical silica particle size, wall thickness, the particle size distribution, density, compressive strength was studied in detail. The properties of the hollow spherical silica prepared by the method of plasma technology were measured, and the result displayed that the hollow spherical silica prepared by the new method has the outstanding characteristics of lower density and higher compressive strength, and can be widely used in oil field, paint industry and aerospace coatings field.