Rheological study of a talc-based paste for extrusion-granulation

P. J. Martin; D. I. Wilson; P. E. Bonnett

doi:10.1016/j.jeurceramsoc.2003.11.003

Rheological study of a talc-based paste for extrusion-granulation

P. J. Martin, D. I. Wilson, P. E. Bonnett

Research output: Contribution to journal › Article › peer-review

Abstract

The rheological behaviour of an industrial talc-based paste featuring a solids volume fraction of 0.49 in a viscous aqueous surfactant solution was studied using a form of capillary rheometry. Standard approaches for determining wall slip velocities yielded non-physical results, although the data could be correlated using the Jastrzebski wall slip condition. The material was also characterised using the Benbow-Bridgwater approach and showed variations with die land diameter which could not be correlated using simple corrections. The parameters obtained featured an accuracy of ±20%. Density measurements indicated that dilation and liquid-phase migration were important features of the flow, and that the stresses are chiefly borne by the liquid-phase. The flow behaviour is interpreted in terms of the component properties: the difficulty in rheological characterisation is attributed to shear-induced re-orientation of the talc platelets during flow. © 2003 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	3155-3168
Number of pages	13
Journal	Journal of the European Ceramic Society
Volume	24
Issue number	10-11
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2003.11.003
Publication status	Published - Sept 2004

Keywords

Extrusion
Platelets
Rheology
Silicates
Suspensions
Talc

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10.1016/j.jeurceramsoc.2003.11.003

Cite this

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title = "Rheological study of a talc-based paste for extrusion-granulation",

abstract = "The rheological behaviour of an industrial talc-based paste featuring a solids volume fraction of 0.49 in a viscous aqueous surfactant solution was studied using a form of capillary rheometry. Standard approaches for determining wall slip velocities yielded non-physical results, although the data could be correlated using the Jastrzebski wall slip condition. The material was also characterised using the Benbow-Bridgwater approach and showed variations with die land diameter which could not be correlated using simple corrections. The parameters obtained featured an accuracy of ±20%. Density measurements indicated that dilation and liquid-phase migration were important features of the flow, and that the stresses are chiefly borne by the liquid-phase. The flow behaviour is interpreted in terms of the component properties: the difficulty in rheological characterisation is attributed to shear-induced re-orientation of the talc platelets during flow. {\textcopyright} 2003 Elsevier Ltd. All rights reserved.",

keywords = "Extrusion, Platelets, Rheology, Silicates, Suspensions, Talc",

author = "Martin, {P. J.} and Wilson, {D. I.} and Bonnett, {P. E.}",

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TY - JOUR

T1 - Rheological study of a talc-based paste for extrusion-granulation

AU - Martin, P. J.

AU - Wilson, D. I.

AU - Bonnett, P. E.

N1 - Times Cited: 14

PY - 2004/9

Y1 - 2004/9

N2 - The rheological behaviour of an industrial talc-based paste featuring a solids volume fraction of 0.49 in a viscous aqueous surfactant solution was studied using a form of capillary rheometry. Standard approaches for determining wall slip velocities yielded non-physical results, although the data could be correlated using the Jastrzebski wall slip condition. The material was also characterised using the Benbow-Bridgwater approach and showed variations with die land diameter which could not be correlated using simple corrections. The parameters obtained featured an accuracy of ±20%. Density measurements indicated that dilation and liquid-phase migration were important features of the flow, and that the stresses are chiefly borne by the liquid-phase. The flow behaviour is interpreted in terms of the component properties: the difficulty in rheological characterisation is attributed to shear-induced re-orientation of the talc platelets during flow. © 2003 Elsevier Ltd. All rights reserved.

AB - The rheological behaviour of an industrial talc-based paste featuring a solids volume fraction of 0.49 in a viscous aqueous surfactant solution was studied using a form of capillary rheometry. Standard approaches for determining wall slip velocities yielded non-physical results, although the data could be correlated using the Jastrzebski wall slip condition. The material was also characterised using the Benbow-Bridgwater approach and showed variations with die land diameter which could not be correlated using simple corrections. The parameters obtained featured an accuracy of ±20%. Density measurements indicated that dilation and liquid-phase migration were important features of the flow, and that the stresses are chiefly borne by the liquid-phase. The flow behaviour is interpreted in terms of the component properties: the difficulty in rheological characterisation is attributed to shear-induced re-orientation of the talc platelets during flow. © 2003 Elsevier Ltd. All rights reserved.

KW - Extrusion

KW - Platelets

KW - Rheology

KW - Silicates

KW - Suspensions

KW - Talc

U2 - 10.1016/j.jeurceramsoc.2003.11.003

DO - 10.1016/j.jeurceramsoc.2003.11.003

M3 - Article

SN - 0955-2219

VL - 24

SP - 3155

EP - 3168

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 10-11

ER -

Rheological study of a talc-based paste for extrusion-granulation

Abstract

Keywords

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