Producing carbide(s) and nitride(s)

In the soln. medium the C-derived material has a compsn. free from solvent, of 70-93 wt.% C, 2-6 wt.% H and 3-20 wt.% O, and a soln. of metals or silicium. The soln. with the C-derived material and the other solns. are brought into contact with each other and the C-derived material and metals or silicium are made to ppte.. High pressure is applied to the ppte., solvent media is removed, and it is then heat-treated in a suitable atmos. to produce a carbide or nitride. The pressure is applied to the ppte. in a micro-fluidiser, rotation mixer, friction or colloid mill, reducing it to a submicron particle size. The soln. with the carbon-derived material and the other solns. are brought into contact with each other through mixing the solvent medium for the C-derived material is organic, polar and aprotic selected from dimethylformamide, dimethylacetemide, tetramethylcarbamide, dimethyltetrahydropyrimidinone, dimethylimidazolidinone, N-methylpyrrolidone and dimethylsulphoxide.