Rheological Properties of Alumina Slurries: Effect of Deflocculant Addition

Papo, A.; Piani, L.

doi:10.1080/02726350701484014

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…This material is of special interest for EPD technology and other electrochemical lm deposition techniques. Tiron showed strong adsorption on alumina, [81][82][83][84] titania, [85][86][87] CuO, 88 SnO, 89,90 Fe 3 O 4 , 47 a-Fe 2 O 3 , 91 hydroxyapatite, 92 yttria stabilized zirconia 93,94 and cordierite-based glass-ceramics. 95 It was shown that tiron forms inner sphere complexes with metal atoms on material surface.…”

Section: Tironmentioning

confidence: 99%

“…81,92,93 The comparison of tiron with other advanced dispersants for alumina suspensions showed that good suspension stability can be achieved at lower tiron concentration, compared to other dispersants. 84 This can be attributed to good adsorption of tiron on particle surface and high charge to mass ratio of this dispersant. Well dispersed slurries with a solid content as high as 50% were obtained.…”

Section: Tironmentioning

confidence: 99%

“…137,138,140,141 The chelating properties of the dyes promoted their adsorption on various metal oxides and allowed good dispersion of oxide particles in water. 84,94,[142][143][144][145] Aluminon and PANa exhibit interesting properties, which are of special interest for EPD. It is important to note that in contrast to AT(NH 4 ) and PANa, the aurintricarboxylic acid (ATH) and pamoic acid (PAH) are insoluble in water.…”

Section: Film Forming Dyes: Aluminon and Pamoic Acid Sodium Saltmentioning

confidence: 99%

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A review of new methods of surface chemical modification, dispersion and electrophoretic deposition of metal oxide particles

2014

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A bio-inspired chemical approach has been developed for the surface modification, dispersion and electrophoretic deposition (EPD) of metal oxide particles. The study of the chemical mechanism of mussel adhesion to different surfaces has driven the development of advanced dispersing agents with strong adsorption to oxide nanoparticles. The investigation of dopamine, caffeic acid, tiron and other molecules from the catechol family, and various molecules from salicylic acid, gallic acid, and chromotropic acid families revealed their strong adsorption to metal oxide surfaces. The analysis of dispersion and deposition yield data for various materials provided an insight into the influence of molecular structures of the organic dispersants on adsorption mechanisms and EPD efficiency. The adsorbed dispersants imparted new and unique properties to the nanoparticles. Further advancements in the EPD technology were achieved by the use of cationic and anionic dyes such as pyrocatechol violet, celestine blue, alizarin red from the catechol family and alizarin yellow, aurintricarboxylic acid and calconcarboxylic acid from salicylate family and their derivatives. It was discovered that polyaromatic dyes can be used as efficient co-dispersants for oxide materials, carbon nanotubes and graphene for the fabrication of composite films by EPD. Another important breakthrough was the development of film forming dispersants for EPD nanotechnology. New strategies have emerged for the synthesis of nonagglomerated nanoparticles of controlled size, organic fibers and coated particles. The use of new dispersants with strong interfacial adsorption and multifunctional properties has driven the development of advanced composites, containing metal oxide nanoparticles, conductive polymers, carbon nanotubes, graphene, polyelectrolytes and other materials. Colloidal and interface chemistry of new dispersing agents is emerging as a new area of technological and scientific interest.

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Section: Tironmentioning

confidence: 99%

Section: Tironmentioning

confidence: 99%

Section: Film Forming Dyes: Aluminon and Pamoic Acid Sodium Saltmentioning

confidence: 99%

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A review of new methods of surface chemical modification, dispersion and electrophoretic deposition of metal oxide particles

2014

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“…In addition, the authors demonstrated that the effect of chloride on the viscosity of slip is greater than that of sulfate. In order to maximize the solid load of the alumina slurry, Papo and Piani [12] investigated the impact of sodium salt of a benzenedisulfonic acid (Tiron), sodium polyphosphate and triammonium salt of aurintricarboxylic acid (Aluminon) on the rheological properties of the alumina slurry. They observed that for all three additives, the viscosity decreases.…”

Section: Introductionmentioning

confidence: 99%

Impact of the Xanthan Gum on Rheological and Mechanical Properties of Slip of Ceramic

Daouadji

Hammadi

Hazzab

2023

MSF

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The slips intended for the manufacture of ceramics must have rheological properties well-defined in order to bring together the qualities required for the casting step (good fluidity for feeding the molds easily settles while generating a regular settling of the dough and for the dehydration phase of the dough in the mold a setting time relatively short is required to have a sufficient refinement which allows demolding both easy and fast). Many additives have added in slip of ceramic in order to improve their rheological and mechanical properties. In this study, we investigated the impact of xanthan gum on rheological and mechanical properties of ceramic slip. The modified Cross model is used to fit the stationary flow curves of ceramic slip at different concentration of xanthan added. The addition of xanthan gum in a concentration range between 0 and 0.4 wt % in slip of ceramic induces the increase in the yield stress, zero shear rate viscosity and the infinite shear rate viscosity of the slip of ceramic. Generally speaking, the presence of xanthan gum modifies the rheological and mechanical properties of the slip. On the other hand, the study shows that an increase in flexural strength with the increase of the amount of xanthan gum in the ceramic slip. All the experimental results indicate an increasing tendency of the interactions between the particles of the raw materials with the highest concentration of xanthan gum.

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“…In this paper, a mention is made of some of the most recent articles: De Vasconcelos et al [4], Lu and Kessler [5], Papo and Piani [6], Pradhan and Bhargava [7], and Tomasik et al [8]. Sodium tripolyphosphate and sodium polyphosphate are anionic inorganic dispersants.…”

Section: Introductionmentioning

confidence: 99%

Sodium Tripolyphosphate and Polyphosphate as Dispersing Agents for Alumina Suspensions: Rheological Characterization

Piani

Papo

2013

Journal of Engineering

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In the present work, the influence of addition of some dispersing agents employed for maximizing the solid loading of alumina concentrated suspensions has been investigated. Two commercially available deflocculants were used: a sodium tripolyphosphate and a sodium polyphosphate. Rheological tests were carried out at 25 ∘ C under continuous flow conditions by using the ratecontrolled coaxial cylinder viscometer Rotovisko-Haake 20, system M5-osc., measuring device SV2P with serrated surfaces. The application of rheological techniques permitted the evaluation of the efficiency and the optimum dosage of the dispersing agents employed upon the alumina slips examined, that is, the critical concentration at which the maximum reduction in viscosity is detected.

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Rheological Properties of Alumina Slurries: Effect of Deflocculant Addition

Cited by 6 publications

References 8 publications

A review of new methods of surface chemical modification, dispersion and electrophoretic deposition of metal oxide particles

A review of new methods of surface chemical modification, dispersion and electrophoretic deposition of metal oxide particles

Impact of the Xanthan Gum on Rheological and Mechanical Properties of Slip of Ceramic

Sodium Tripolyphosphate and Polyphosphate as Dispersing Agents for Alumina Suspensions: Rheological Characterization

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