Abstract
The dispersion of highly concentrated Zirconium diboride (ZrB2) suspension in aqueous media was investigated in terms of zeta potential and rheological measurements, with a salt of polyacrylate polymer (SD‐07) as dispersant. The adsorption behavior of SD‐07 on ZrB2 particle surface was also studied. Results showed that acid cleaning improved the fluidity of aqueous ZrB2 slurry. Concentrated (up to 50 vol%) and well‐stabilized suspension was obtained in the alkaline pH region, with 0.60 mg/m2 SD‐07. On this basis, 50 vol% ZrB2 gelcasting slurry was prepared. The linear shrinkage and flexural strength of as‐casted green body were (3.42 ± 0.13)% and (9.4 ± 0.3) MPa, respectively.
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