Aqueous Dispersion of ZrB2 Powder - Effect of Surface Corrosion and Dispersant

Sea Hoon Lee; Yoshio Sakka; Yutaka Kagawa

doi:10.4028/www.scientific.net/SSP.124-126.1525

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HomeSolid State PhenomenaSolid State Phenomena Vols. 124-126Aqueous Dispersion of ZrB2 Powder - Effect of...

Aqueous Dispersion of ZrB₂ Powder - Effect of Surface Corrosion and Dispersant

Abstract:

Hydrolysis and dispersing behavior of aqueous ZrB2 slurry were investigated. The isoelectric point (IEP) of ZrB2 slurry was measured to be pH 6.3. The acid and base slurry underwent rather rapid change of pH after fabrication for one and three hours, respectively. The oxygen content of the boride powder increased slowly with static ageing time in acid and neutral slurries, while the value decreased in base slurry. Application of poly(ethyleneimine) changed IEP of the boride slurry to pH 10.4. Sedimentation test informed that stability of the slurry was improved when increasing the molecular weight of poly(ethyleneimine) to 70,000 and in acid slurry (pH 3).

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Periodical:

Solid State Phenomena (Volumes 124-126)

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1525-1528

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https://doi.org/10.4028/www.scientific.net/SSP.124-126.1525

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Online since:

June 2007

Authors:

Sea Hoon Lee, Yoshio Sakka, Yutaka Kagawa

Keywords:

Aqueous, Hydrolysis, pH, Polyethyleneimine, Slurry, ZrB₂

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