Kawakita compaction, equation

The Kawakita compaction equation is another equation which is often used for ceramic powder pressing. It can be derived by considering that compaction is similar to packing by tapping, where the compaction pressure, P, is directly substituted for the number of taps, N, in the analysis in Section 13.5.1. The Kawakita equation is a special case, where the value of m in the Weibul distribution function for tapping is 1. In the Kawakita equation, the compaction, C, defined as the relative reduction in volume is given by [72]... 

A new model was compared to known compaction equations, including Kawakita and Heckel, for some mineral salts. Panelli and Filho (2001) concluded that Equation 12 best represents the density-pressure relationship for powders, obtaining a linear correlation coefficient close to the unity. 

Ramberger, R. and Burger, A. 1985. On the application of the Heckel and Kawakita equations on powder compaction. Powder Technol. 43, 1-9. 

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