Carbon Filament Incandescent Lamp

Abstract

About the boiling point of pure carbon, we have no accurate data and some authoritiesreached the fact that the melting point of carbon is higher than the boiling point, forwhich we must deny from reasoning of molecular freedom, and melting point of carbonseems to be higher than the boiling point of tungsten.
On the other hand, vaporization of carbon on high temperature is deceived by thereaction of impurities contained in carbon, acting as carbon carrying agent.
But to purify the impurities, especially magnesium oxide, to the extent that they donot cause any chemical reactions, is practically difficult. My investigation proceed to performto prevent the vaporization due to carbon carrying reaction by using halogen gas as destructionof reversible chemical reaction and reached high efficiency carbon incandescent lamp bytreating the carbon filament under high temperature by chlorine compound of carbon.