The surface characteristics of polyacrylamide-coated silicon carbide powder used in the preparation of highly concentrated ceramics suspensions |
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| Authors: | Mingkun Wei Guangjun Zhang Qide Wu |
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| Affiliation: | (1) School of Science, Wuhan University of Technology, Wuhan, 430070, People's Republic of China;(2) the Chinese Academy of Sciences, Shanghai Institute of Optics and Fine Mechanics, Shanghai, 201800, People's Republic of China;(3) School of Materials and Engineering, Wuhan University of Technology, Wuhan, 430070, People's Republic of China |
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| Abstract: | Polyacrylamide (PAAM) coating layer was formed by chemical methods on the SiC powder surface. The surface characteristics of polyacrylamide (PAAM)-coated silicon carbide (SiC) powder were analyzed. The carbonyl band of amide and NH2 deformation absorbing band existed at 1638 cm–1, 1619 cm–1 in the Fourier Transform Infrared Spectra (IR). Transmission electron microscopy (TEM) showed clearly the powder was coated by an organic compound layer which was PAAM judged by the reaction. The result of Differential Scanning Thermal Analyses (DSC) and Thermogravimetic (TG) showed the oxidizing decomposion temperature of PAAM was 411.9°C. The coating layer changed the surface characteristics of the SiC powder. At pH = 5, the suspensions of homogeneity and stability with 55 vol% solid content was prepared. |
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