Utente:Ub/Sandbox: differenze tra le versioni
Contenuto cancellato Contenuto aggiunto
Ub (discussione | contributi) |
Ub (discussione | contributi) |
||
Riga 26:
[[Image:Crystal_growth.PNG|frame|right|Crystal growth]]
Once the first, small crystal, called [[nucleus]], this acts as a convergence point if unstable (due to supersaturation) [[molecules]] of solute touching - or coming neart to - the crystal so that it increases its own dimension in successive layers, something like an onion, as shown in the picture, where each colour shows the same mass of solute; this mass creates increasingly thin layers due to the increasing surface of the growing crystal. The supersaturated solute mass the original nucleus may ''capture'' in a time unit is called ''growth rate'' expressed in kg/(m<sup>2</sup>*h), and is a constant specific to the process: it is influenced by several phisical factors, such as [[surface tension]] of solution, [[pressure]], [[temperature]], relative crystal [[velocity]] in the solution, [[Reynolds number]], etcetera.
The main values to control are therefore:
| |||