Reference : Mullite coatings on ceramic substrates: Stabilisation of Al2O3-SiO2 suspensions for s...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/17131
Mullite coatings on ceramic substrates: Stabilisation of Al2O3-SiO2 suspensions for spray drying of composite granules suitable for reactive plasma spraying
English
Schrijnemakers, Audrey mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie inorganique structurale >]
Andre, Sophie [Belgian Ceramic Research Center, Mons > > > >]
Lumay, Geoffroy mailto [Université de Liège - ULg > Département de physique > Physique statistique >]
Vandewalle, Nicolas mailto [Université de Liège - ULg > Département de physique > Physique statistique >]
Boschini, Frédéric mailto [Université de Liège - ULg > Département de physique > Physique statistique >]
Cloots, Rudi mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie inorganique structurale - Doyen de la Faculté des Sciences >]
Vertruyen, Bénédicte mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie inorganique structurale >]
2009
Journal of the European Ceramic Society
Elsevier Science
29
11
2169-2175
Yes (verified by ORBi)
International
0955-2219
Oxford
United Kingdom
[en] Mullite ; Refractories ; Suspensions
[en] The present work deals with the preparation of stable alumina + silica suspensions with high solid loading for the production of spray-dried composite powders. These composite powders are to be used for reactive plasma spraying whereby the formation of mullite and the coating on a ceramic substrate are achieved in a single step process. Electrostatic stabilisation of alumina and silica suspensions has been studied as a function of pH. Silica suspensions are most stable at basic pH whereas alumina suspensions are stable at acidic pH. The addition of ammonium polymethacrylate (APMA) makes it possible to stabilise alumina and prepare a stable 50 wt% alumina + silica suspension at pH 10. The optimum amounts of dispersant and binder have been determined by zeta potential, viscosity and sedimentation measurements. Spray drying of the suspension yields composite powders whose morphology, size distribution and flowability have been characterized before realizing reactive plasma spraying tests. (C) 2009 Elsevier Ltd. All fights reserved.
http://hdl.handle.net/2268/17131
10.1016/j.jeurceramsoc.2009.01.031
The following article appeared in Journal of the European Ceramic Society and may be found on the editor website http://www.sciencedirect.com/

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