Diffusion submicron solid particles

Applying basic concepts of solid-state diffusion to transport across the boundaries of coalescing submicron panicles is difficult. Information is lacking on the crystalline state and the nature of the struclural imperfections in the colliding particles. However, values of the solid-.state diffusion coefficient can provide qualitative guidance in estimating the effects of material properties on primary particle size as discussed in a later section. 

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