Rheological properties of tin oxide suspensions

Abstract

The 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 15 O 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. #

Pure red upconverted and near‐infrared luminescence properties of Er3+‐doped SnO2 nanocrystals for lighting applications

“…In addition to this, the phonon energy of SnO 2 is very low (630 cm À1 ) and hence it reduces the non-radiative energy transfer among Ln 3+ excited states. Tin oxide is one of the most promising materials for a wide range of applications such as sensors [11,12], energy storage systems [13], rheological [14], anti-bacterial [15], anti-oxidant and anti-tumour agents for cancer cells [16].…”