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https://doi.org/10.21278/TOF.42304

Stabilization of Highly Concentrated Alumina Suspensions by Different Dispersants

Ivana Sever   ORCID icon orcid.org/0000-0002-6287-9677 ; Department of Materials, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Irena Žmak   ORCID icon orcid.org/0000-0001-7994-3615 ; Department of Materials, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Lidija Ćurković ; Department of Materials, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Zrinka Švagelj ; Department of Materials, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia

Puni tekst: engleski, pdf (1 MB) str. 61-70 preuzimanja: 437* citiraj
APA 6th Edition
Sever, I., Žmak, I., Ćurković, L. i Švagelj, Z. (2018). Stabilization of Highly Concentrated Alumina Suspensions by Different Dispersants. Transactions of FAMENA, 42 (3), 61-70. https://doi.org/10.21278/TOF.42304
MLA 8th Edition
Sever, Ivana, et al. "Stabilization of Highly Concentrated Alumina Suspensions by Different Dispersants." Transactions of FAMENA, vol. 42, br. 3, 2018, str. 61-70. https://doi.org/10.21278/TOF.42304. Citirano 18.11.2019.
Chicago 17th Edition
Sever, Ivana, Irena Žmak, Lidija Ćurković i Zrinka Švagelj. "Stabilization of Highly Concentrated Alumina Suspensions by Different Dispersants." Transactions of FAMENA 42, br. 3 (2018): 61-70. https://doi.org/10.21278/TOF.42304
Harvard
Sever, I., et al. (2018). 'Stabilization of Highly Concentrated Alumina Suspensions by Different Dispersants', Transactions of FAMENA, 42(3), str. 61-70. https://doi.org/10.21278/TOF.42304
Vancouver
Sever I, Žmak I, Ćurković L, Švagelj Z. Stabilization of Highly Concentrated Alumina Suspensions by Different Dispersants. Transactions of FAMENA [Internet]. 2018 [pristupljeno 18.11.2019.];42(3):61-70. https://doi.org/10.21278/TOF.42304
IEEE
I. Sever, I. Žmak, L. Ćurković i Z. Švagelj, "Stabilization of Highly Concentrated Alumina Suspensions by Different Dispersants", Transactions of FAMENA, vol.42, br. 3, str. 61-70, 2018. [Online]. https://doi.org/10.21278/TOF.42304

Sažetak
Slip casting is a widely used colloidal technique for consolidation of ceramic powders from a suspension. The colloidal approach ensures homogeneous microstructure of a green body, thereby reducing post-sintering machining and production costs. The process consists of several steps. The first step is to mix the ceramic powder with a liquid, usually water, where the stabilization of the new obtained suspension with different dispersants follows. When an optimum dispersion of particles is achieved, resulting in low slip viscosity, ceramic slurry can finally be poured into a porous mould, usually a gypsum one.
The influence of different dispersants on rheological properties of highly concentrated alumina (Al2O3) suspensions was investigated. The used dispersants were: ammonium polymethacrylate water solution (Darvan C-N), 4,5-dihydroxy-1,3-benzenedisulfonic acid disodium salt (Tiron) and citric acid. The amount of dispersants was varied from 0.1-1.25 wt. % in order to determine the optimum. Rheological properties of the prepared suspensions were determined by measuring the apparent viscosity at different shear rates. The obtained optimal amount was 0.75 wt. % for Darvan, 0.1 wt. % for Tiron and 0.3 wt. % for citric acid. The obtained results show that the most effective dispersant is 4,5-dihydroxy-1,3-benzenedisulfonic acid disodium salt, given that only 0.1 wt. % was required to stabilize the 70 wt. % Al2O3 suspension.

Ključne riječi
alumina; suspensions; slip casting; stabilization

Projekti
HRZZ / IP / IP-2016-06-6000 / WECOR - Napredna monolitna i kompozitna keramika za zaštitu od trošenja i korozije

Hrčak ID: 206944

URI
https://hrcak.srce.hr/206944

Posjeta: 585 *