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Materials 2013, 6(9), 4249-4258; doi:10.3390/ma6094249

Co-Dispersion Behavior of ZrB2–SiC–B4C–C Powders with Polyethyleneimine

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Engineering Ceramics Department, Korea Institute of Materials Science (KIMS), 797 Changwondaero, Changwon, Gyeongnam 642-831, Korea
Authors to whom correspondence should be addressed.
Received: 8 July 2013 / Revised: 20 August 2013 / Accepted: 20 August 2013 / Published: 23 September 2013
(This article belongs to the Special Issue Ultra-high Temperature Ceramics)
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The aqueous dispersion behavior of ZrB2, SiC powders with B4C and C as sintering aids was investigated. Well co-dispersed suspension can be obtained in acidic solutions in presence of polyethyleneimine (PEI). The adsorption of PEI on the powder surface was measured by thermal gravimetric (TG) analysis. Rheological measurements displayed the effect of dispersant on the flow behavior of as-prepared slurries. An optimum condition was obtained with 1 wt % PEI. The viscosity of 40 vol % ZrB2–SiC–B4C–C (ZSBC) suspension at 100 s−1 was as low as 0.74 Pa·s, which was suitable for aqueous processing.
Keywords: ZrB2; dispersion; suspension; surface; rheological behavior ZrB2; dispersion; suspension; surface; rheological behavior
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Yin, J.; Chen, J.; Liu, X.; Zhang, H.; Yan, Y.; Huang, Z.; Jiang, D. Co-Dispersion Behavior of ZrB2–SiC–B4C–C Powders with Polyethyleneimine. Materials 2013, 6, 4249-4258.

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