Water Diffusion Measurements in Melts

Water diffusion measurements in melts are carried out in a similar manner to those in glasses. In this case, however, the melt must be contained in a crucible. As a result, diffusion can only occur from one surface instead of from 2 surfaces as is the case for plates. Eq. 11.3 is altered by replacing the factor of 16 by a factor of 4  

Water diffusion in melts can be measured during either addition or removal of water. Most studies are based on addition of water by exposure of the melt to flowing air or nitrogen saturated by passing the 

---