New Number Based Expression and Various Mean Particle Diameters for Rosin-Rammler Distribution

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  • 個数基準の新しいRosin-Rammler分布と各種平均粒径の算出
  • コスウ キジュン ノ アタラシイ Rosin Rammler ブンプ ト カク

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Abstract

The present study deals with the characterization in the particle size distributions of metallic powders. The Rosin-Rammler distribution is used as a particle size distribution function for its good applicability. First, a new number based expression is introduced for a modified Rosin-Rammler distribution which has been led in the previous paper, and compared with the previous expression. Next, the calculating equations are presented for the various mean particle diameters of the powders, having the distributions. Furthermore, the calculation can be extended to the cases of classification and blending of those powders.<BR>The results are summarized as follows:<BR>(1) New number based approximate equation (16) is at least ten times more accurate for the expression of the modified Rosin-Rammler distribution than the equation (11) in the previous paper.<BR>(2) The equations for the calculation of the various mean particle diameters of the distributions are tabled in Table 3.<BR>(3) The various mean particle diameters can be also calculated in the cases of classification and blending of the powders, having the distributions.<BR>The present results are also applicable to other distributions such as grain, pore sizes, etc.

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