Plasma chemical decomposition of fluoride solutions

The first experiments on the plasma chemical decomposition of fluoride solutions containing tantalum or niobium to obtain tantalum and niobium oxides were reported about fifteen years ago [524]. Subsequent publications were devoted to further development and expansion of the method for other refractory rare metals such as titanium and zirconium [525 - 532], 

The plasma chemical method for the thermal decomposition of solutions has been preferred over gas-flame heating for the following reasons [532]  

Significantly higher initial temperature of heating source - up to 3000 -10000K  

Significantly higher temperature can be achieved during the process - up to 2500K  

No additional gaseous components that coming from gaseous heating source in the case of gas-flame process  

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