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Polyethylenimine (PEI, Mw 50,000) was employed as a dispersant to stabilize nanosized ZrO2 (3 mol% Y2O3 doped) aqueous suspensions. Adsorption isotherm measurements demonstrated that the plateau region of coverage was reached when polymer concentration approached 1.0 wt% dry weight basis of ZrO2 and beyond at fixed pH values. The positively charged polymer chains showed a high affinity type of adsorption...
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