Zone Melting and Refining

For the case of Zone-Melting to form a single- crystal, we can distinguish between two separate cases, namely- horizontal and vertical zone melting. This is shown as foUows in the foUowing  

In the horizontal case, we flU a boat with powder whereas the verticcd method requires a pressed rod, made from powder. Tlie heating- source iUustrated is a R.F. - coil. This is the best heat- source, providing that the 

Measuring particle size and growing single crystals 

The vertical method shown above has sometimes been called the floating zone method. The thickness of polycrystalline rod determines the maximum length of melt zone that can be used successfully. This relation can be calculated from  

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