Abstract: The present paper deals with a primary study on the dispersion behavior of Al₂O₃ /NiAl slurries. The experiments are shown as follows: the zeta potential of both Al₂O₃ and NiAlparticles reaches the highest point in a slurry with respect to pH> 10. 6. For Al₂O₃ slurries with a solid content higher than 40 vol% , the optimum pH range is 11～12; the optimum dispersant contents of 40 vol% , 50 vol% and 60 vol% slurries are 0. 6 wt% , 2. 8 wt% and 8. 0 wt% respectively.For NiAl slurries with a solid content less than 30 vol% , the optimum pH range is 9～11; the optimum dispersant content is 0. 5 wt% . The slurry with 50 vol% ( Al₂O₃ / NiAl-20) exhibits excellent dispersion behavior under the best dispersing conditions.