Spray drying of TiO2 nanoparticles into redispersible granules

Faure, Bertrand; Lindeløv, Jesper Sæderup; Wahlberg, Michael; Adkins, Nicholas J.E.; Jackson, Phil; Bergström, Lennart

doi:10.1016/j.powtec.2010.05.033

Cited by 47 publications

(29 citation statements)

References 36 publications

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“…This first requires investigation of the colloidal behaviour and rheology of the ceramic oxide system involved. These aspects have been extensively studied for titania nanosuspensions in recent years [6,7], also by some authors of this paper [8][9][10]. However, nanosuspensions of Al 2 O 3 have drawn less attention, probably because of the difficulty of making relatively concentrated suspensions of this oxide [11][12][13].…”

Section: Introductionmentioning

confidence: 89%

Study of colloidal behaviour and rheology of Al2O3–TiO2 nanosuspensions to obtain free-flowing spray-dried granules for atmospheric plasma spraying

Vicent

Sánchez

Mallol

et al. 2013

Ceramics International

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This work deals with the dispersion and stabilisation of nanosized Al 2 O 3 and TiO 2 particles in aqueous medium. The dispersing conditions were studied as a function of pH, dispersant content, solid loading and ageing.Well-dispersed nanosuspensions of Al 2 O 3 with solids contents up to 15 vol.% and TiO 2 with solids contents up to 30 vol.% were obtained by dispersing each type of nanoparticles with 4 wt% of polyacrylic acid-based polyelectrolyte. In order to obtain a concentrated 87 wt% Al 2 O 3 -13 wt% TiO 2 suspension, a 15 vol.% homogeneous nanosuspension, composed by alumina and titania nanopowders, was prepared and then reconstituted by spray-drying into free-flowing powders. This spray-dried powder showed an adequate granule size distribution, a very high flowability and a reasonable density for diverse purposes, such as to be used in atmospheric plasma spraying as a feedstock to obtain nanostructured coatings. Keywords A. SuspensionsA. Spray-drying B. Nanoparticle

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Section: Introductionmentioning

confidence: 89%

Study of colloidal behaviour and rheology of Al2O3–TiO2 nanosuspensions to obtain free-flowing spray-dried granules for atmospheric plasma spraying

Vicent

Sánchez

Mallol

et al. 2013

Ceramics International

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“…Mónica Vicent Cabedo (1) Emilie Marie Bannier (1) Rodrigo Moreno Botella (2) Mª Dolores Salvador Moya (3) Enrique Sánchez Vilches …”

Section: List Of All Authors and Their Affiliationsmentioning

confidence: 99%

“…In order to obtain nanostructured coatings it is necessary to use nanoparticles as raw material. However, nanoparticles need to be reconstituted to a sprayable size in order to use regular powder feeders as well as to provide a route to safe handling of nanoparticles [1]. Reconstitution generally takes place by spray drying of a nanoparticle suspension and, frequently, thermal treatment (partial sintering) of the resulting granules [2].…”

Section: Introductionmentioning

confidence: 99%

“…Atmospheric plasma spraying coatings from alumina-titania feedstock comprising bimodal particle size distributions Mónica Vicent (1) , Emilie Bannier (1) , Rodrigo Moreno (2) , Mª Dolores Salvador (3) , Enrique Sánchez (1) (1) Instituto de Tecnología Cerámica (ITC), Asociación de Investigación de las Industrias Cerámicas (AICE), Universitat Jaume I (UJI), Castellón, Spain. …”

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Atmospheric plasma spraying coatings from alumina–titania feedstock comprising bimodal particle size distributions

Vicent

Bannier

Moreno

et al. 2013

Journal of the European Ceramic Society

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“…Large zeta potentials were obtained for these commercial nanopowders dispersed with a polyelectrolyte. Faure et al [25] optimised the stability of an anatase-rutile nanotitania suspension in terms of dispersing agents concentration and pH by measuring the rheological properties of differently prepared suspensions. In this case, 25 wt% solids content nanosuspensions were used for spray-drying.…”

Section: Introductionmentioning

confidence: 99%

Dispersion of mixtures of submicrometer and nanometre sized titanias to obtain porous bodies

Vicent

Sánchez

Molina

et al. 2013

Ceramics International

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The stability and rheological behaviour of bimodal titania suspensions was studied.Bimodal mixtures were prepared by mixing nanosized TiO 2 powders with an average primary size of ~20-40 nm and surface area of ~50 m 2 /g and/or a colloidal titania suspension of the same nanopowders dispersed in water with a submicrometer sized titania. The dispersing conditions were studied as a function of pH, type and content of dispersant, and sonication time for a constant solids content of 30 vol.% (62 wt%). The mixtures were slip cast and presintered at low temperatures (800−1000 ºC) in order to obtain porous materials with anatase as the major phase. The pore size distribution, microstructure and phase composition were characterised using MIP, SEM and XRD techniques, respectively.

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Spray drying of TiO2 nanoparticles into redispersible granules

Cited by 47 publications

References 36 publications

Study of colloidal behaviour and rheology of Al2O3–TiO2 nanosuspensions to obtain free-flowing spray-dried granules for atmospheric plasma spraying

Study of colloidal behaviour and rheology of Al2O3–TiO2 nanosuspensions to obtain free-flowing spray-dried granules for atmospheric plasma spraying

Atmospheric plasma spraying coatings from alumina–titania feedstock comprising bimodal particle size distributions

Dispersion of mixtures of submicrometer and nanometre sized titanias to obtain porous bodies

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