Santos, Iêda Maria Garcia dosSouza, Antônio Gouveia deSensato, Fabrício RonilLeite, Edson RobertoLongo, Elson [UNESP]Varela, José Arana [UNESP]2014-05-272014-05-272002-08-01Journal of the European Ceramic Society, v. 22, n. 8, p. 1297-1306, 2002.0955-2219http://hdl.handle.net/11449/66944The rheological properties of tin oxide slurries were studied experimentally and theoretically. The deflocculants used were ammonium polyacrilate (PAA) and the copolymer poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate) (PVB-PVA-PVAc), in water and ethanol, respectively. The amount of deflocculant was optimized for different solid contents by means of viscosity measurements. In spite of the high stability of PVB-dispersed slurries, a high solid concentration was not obtained. On the other hand, a slurry with a 56.4 vol.% of solids was attained when PAA was used. A theoretical study of the adsorption of PAA in its dissociated (basic solution) and non-dissociated (acidic solution) forms on SnO 2 (110) is presented. This analysis was made by means of the PM3 method using a large cluster Sn 15O 28 for the surface model. The calculated adsorption energy is larger for the ionized PAA than for the non-ionized form, indicating that alkaline slurries favor PAA adsorption on the SnO 2 surface. © 2002 Elsevier Science Ltd. All rights reserved.1297-1306engAdsorptionDeflocculantsModelling-adsorptionRheologySnO 2Ammonium compoundsEthanolSlurriesVinyl resinsViscosity measurementWaterAdsorption energyTin compoundsadsorptionrheologysuspensiontin oxideArtigo10.1016/S0955-2219(01)00440-XWOS:000175329300014Acesso restrito2-s2.0-0036680765