PERIODIC PRECIPITATION IN A COMPETITIVE PARTICLE GROWTH-MODEL

The paper explores the possibility of using periodic precipitation to prepare anisotropic materials, on the basis of a numerical model of th e time evolution and product distribution in periodic precipitates for med by competitive particle growth. The model envisages a pre-existing uniformly distributed material. After a time which depends on the sam ple length and other system parameters, a nearly stationary state is r eached, in which the band spacings and masses, and the radii of indivi dual particles are indeed much more uniform than they are in systems w hich depend primarily on reagent diffusion.