A New Perspective on Powder Flowability Evaluation—Analysis Focused on Distribution of Basic Powder Properties—

Abstract

This review article evaluates the powder flowability of nine different samples, focusing on differences in particle diameter distribution. Because the proportion of fine particles that can reduce flowability varies depending on the sample preparation conditions, the use of the median diameter as the representative value for each sample is inappropriate. Instead, we proposed a method to use the particle diameter that maximizes the coefficient of determination obtained by regression analysis between the powder flowability and the particle diameter. The test results showed that the particle diameter at a cumulative ratio of 10% was appropriate as the representative value.