Why are gas discharge tubes not used as heating elements?
In a gas discharge tube, no heating wire can corrode or melt. The temperature resistance depends solely on the tube material. Inert, high-temperature-resistant ceramics (e.g., Al2O3) can be used instead. The cathodes can be made compact and durable. 100% efficiency for converting electricity into heat is guaranteed. The required temperature is 1200-1600°C for a volume…