Abstract
A new process for fine TiC powder of high purity has been studied, which consists of the following two stages:
(1) The mixture of fine TiC powder and free carbon is obtained from the mixture of TiO2 and C (TiO2:C<1:3). Mixing agent is added for homogeneous dispersion of TiO2 particles.
(2) The carburized lump produced in the first stage is heated with metallic Ca and then treated by dilute acid to remove free carbon.
This paper reports the effects of mixing agents such as castor oil, poly-oxyethylene nonyl phenyl ether, phenol resin (diluted by toluene) and pitch (medium viscosity) on the particle size of the vacuum-carburized products in the stage (1).
These mixing agents were all effective in dispersing TiO2 particles in the mixtures, but the vacuum-carburized products were not always fine. The best result was obtained by using castor oil as mixing agent.
