Solubility of Carbon in 030-8203 and BaO-B^Os Slags

The solubility of carbon in molten CaO-B(2)O(3) and B(2)O(3) slags at high temperatures was measured to understand the dissolution mechanism of carbon into the slags. The B(2)O(3)-bearing slags, which have a wide range of liquids, at the temperature of interest have been applied to investigate the effect of basicity on the solubility of carbon from the saturation of acidic or basic components. The solubility of carbon, as a function of the composition of slags, shows a minimum value, and it is suggested that carbon dissolves by different mechanisms in the acidic and basic slags, respectively. From the infrared spectra measurements, the wave number indicating the B-C bond was found to be about 1150 cm ʹin the acidic region of slags; hence, the incorporation of carbon into the borate network was confirmed qualitatively. The carbide capacity was compared to the nitride capacity, showing that the dissolutions of carbon and nitrogen into the slags are similar.