Diffusion of Sodium into Silicon dioxide

by Richard Curtis

Submitted : Spring 2014

The objective of this project is to determine how many atoms of Sodium will penetrate into a Silicon dioxide solid layer over the given length of the experiment. This is done by using the error function built into excel and the given values to solve for the Diffusivity constant of the Sodium, and then deriving with respect to z, the distance penetrated, to find the expression for the flux. Once the expression for flux is derived, it is then integrated with respect to time from 0 to t to give the formula for the number of Sodium atoms per square centimeter after any given time. The time 360 seconds is then plugged into this formula to find the amount of Sodium atoms to penetrate the solid layer over the length of this experiment.

[ Back ]