Preparation of high solids content nano-titania suspensions to obtain spray-dried nanostructured powders for atmospheric plasma spraying
Impacto
Scholar |
Otros documentos de la autoría: Vicent Cabedo, Mónica; Sánchez-Vilches, Enrique; Moreno Berto, Arnaldo Vicente; Moreno, Rodrigo
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7033
comunitat-uji-handle3:10234/8618
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http://dx.doi.org/10.1016/j.jeurceramsoc.2011.08.007 |
Metadatos
Título
Preparation of high solids content nano-titania suspensions to obtain spray-dried nanostructured powders for atmospheric plasma sprayingAutoría
Fecha de publicación
2012Editor
ElsevierISSN
0955-2219Cita bibliográfica
Journal of the European Ceramic Society (Jan. 2012) vol. 32, no. 1, p. 185-194Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.sciencedirect.com/science/article/pii/S0955221911004092Palabras clave / Materias
Resumen
Nanosized TiO2powder with an average primary size of ∼20 nm and surface area of ∼50 m2/g (Aeroxide®P25, Degussa-Evonik, Germany) was used as starting material. A colloidal titania suspension from the same supplier was ... [+]
Nanosized TiO2powder with an average primary size of ∼20 nm and surface area of ∼50 m2/g (Aeroxide®P25, Degussa-Evonik, Germany) was used as starting material. A colloidal titania suspension from the same supplier was also used (W740X). The dispersing conditions were studied as a function of pH, dispersant content, and solids loading. Well-dispersed TiO2 nano suspensions with solids contents up to 30 vol.% (62 wt%) were obtained by dispersing the powder with 4 wt% PAA. Suspensions with solids contents as high as 35 vol.% were prepared by adding the TiO2 nanoparticles to the TiO2 colloida lsuspension under optimised dispersing conditions.
TiO2powder reconstitution was performed by spray drying both types of nanosuspensions to obtain free-flowing micrometre-sized nanostructured granules. The spray-dried nanostructured TiO2 granules were deposited on austenitic stainless steel coupons using atmospheric plasma spraying. Coating microstructure and phase composition were characterised using scanning electron microscopy and X-ray diffraction techniques. [-]
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