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The Calculation Method of Particles Diameter of Three Typical Bulk Materials Based on Experimental Study

The diameter and the shape of particle were the important characteristics of solid particle. The purpose of this paper was to observe the shape and to measure the diameter of bulk material particles included ferroferric oxide, silicon dioxide and sodium chloride, and to explore the most suitable calculation method of these bulk material particles. The studied results showed that the calculation formulas of the equivalent diameter of equal volume sphere and the equivalent diameter of equal surface area sphere were both applicable to the particle with micro-shape approximated to spheroid, such as ferroferric oxide particle. And the formula of the equivalent diameter of equal surface area sphere was more applicable to the particle with micro-shape approximated to regular tetrahedron, such as silicon dioxide particle. As for the particle with micro-shape approximated to regular hexahedron, such as sodium chloride particle, the formula of the equivalent diameter of equal volume sphere was more applicable.