A viscoelastic approach from alpha-Al2O3 suspensions with high solids content

Author(s)

Setz, Luiz F. G. ^[1] ; Silva, Antonio C. ^[2] ; Santos, Silas C. ^[2] ; Mello-Castanho, Sonia R. H. ^[2] ; Morelli, Marcio R. ^[3]

Affiliation

^[1] Fed Univ ABC, Ctr Engn Modeling & Appl Social Sci, BR-09210580 Santo Andre, SP - Brazil

^[2] Nucl & Energy Res Inst, Mat Sci & Technol Ctr, BR-05508900 Sao Paulo - Brazil

^[3] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Journal of the European Ceramic Society; v. 33, n. 15-16, p. 3211-3219, DEC 2013.
• Web of Science Citations: 5

Abstract

The flow properties of high solids concentration suspensions has been extensively studied and established, however, the rheological behavior for ceramics suspensions with very high solids loading, up to 60 vol.% is poorly known. This is due to both difficulties of preparation and behavior measurement. The theory shows ceramics suspensions with very high solids loading may present viscoelastic properties attributed to interparticle forces active. The oscillatory and creep-recovery rheological measurements can provide this knowledge when discretion used. Thus, rheological behavior of alumina suspensions with high solids loading (>43 vol.%), properly stabilized and the characterization of slip casting shaped samples has been analyzed. High solids loading suspensions, over 43 vol.%, present adequate flow and suspensions with solid content since 60 vol.% present viscoelastic properties attributed to interparticle forces active. The rheological parameters can provide subsidies to obtain after shaping process, such as extrusion, injection and plastic pressing, suitable products for the desired application. (C) 2013 Elsevier Ltd. All rights reserved. (AU)