Reference : Interactions in YBa2Cu3O7-x aqueous suspensions
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
Interactions in YBa2Cu3O7-x aqueous suspensions
Dusoulier, Laurent [Royal Military Academy, Brussels, Belgium > CISS Department > > >]
Cloots, Rudi mailto [Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale - Doyen de la Faculté des Sciences >]
Vertruyen, Bénédicte mailto [Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale >]
Garcia-Fierro, Jose L [Instituto de Catálisis y Petroquímica, CSIC, Madrid, Spain > > > >]
Moreno, Rodrigo [Instituto de Cerámica y Vidrio, CSIC, Madrid, Spain > > > >]
Ferrari, Begona [Instituto de Cerámica y Vidrio, CSIC, Madrid, Spain > > > >]
Materials Chemistry & Physics
Elsevier Science
Yes (verified by ORBi)
[en] Ceramics ; Surfaces ; Superconductors, X-ray photo-emission spectroscopy (XPS)
[en] Surface charging mechanism of YBa2Cu3O7-x (YBCO) particles in water has been investigated in order to understand their colloidal behaviour and stabilise concentrated suspensions. A broad study relating the suspension parameters (pH and zeta potential) vs. the conditions of the suspension performance (atmosphere and time) has been shown and discussed. The zeta potential values remain positive in all the pH range for the highest powder concentration studied (10 g l(-1)), evidencing a large influence of the solid content in the particle charge. The chemistry of YBa2Cu3O7-x in water has been studied through the chemical analysis of the supernatant by inductively coupled plasma (ICP), and the surface analysis of the particles by X-ray diffraction analysis (XRD) and X-ray photoelectron spectroscopy (XPS). The presence of BaCO3, CuO, and the hydrolysed Ba species, such as Ba(OH)(2) and Ba(OH)(+), at the particles surface has been evaluated as a function of the powder concentration. Based on these analyses, the dependence of the colloidal behaviour of YBCO on the presence of Ba soluble species has been determined. A stabilisation mechanism for YBCO particles in aqueous suspension focus on the powders deleterious minimization was proposed. (C) 2009 Elsevier B.V. All rights reserved.
Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; Spanish Science and Education Ministry
Interuniversity Attraction Pole INANOMAT (P6/17)
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The following article appeared in Materials Chemistry and Physics and may be found on the editor website

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