Characteristics of SiC/nano-TiN Aqueous Mixed Slurry and Its Spray Drying Behavior
SiC/纳米TiN水基复合料浆特性及喷雾干燥

The aqueous slurries were prepared usingtetramethyl ammonium hydroxide (TMAH) as dispersant, nano-TiN and submicron SiC powders as starting materials. The dispersion, stabilization mechanism and spray drying behaviors of SiC/nano-TiN aqueous mixed slurry were analyzed. The results show that TMAH can be absorbed on the surface of nano-TiN and SiC particles, and the dispersibility of particles is cooperatively improved by electrostatic and steric effects. The mixed slurry possesses better dispersion and stabilization when pH value is 8 and the amount of TMAH is 0.75wt%, and the SiC/nano-TiN composite powders prepared by spray drying distribute uniformly with good fluidity.