Rheological properties of paraffin suspensions of surface-modified alumina powder for low-pressure injection moulding
authors Novak, S; Olhero, SMH; Ferreira, JMF; Zupancic, A
nationality International
author keywords injection moulding; alumina; chemisorption; ceramics; viscoelastic properties; stability
abstract Due to the hygroscopic nature of fine alumina powders, the presence of water may have a detrimental effect on the rheological properties of a suspension in melted paraffin for low-pressure injection moulding (LPIM). For this reason, a modification of the powder surface from hydrophilic to hydrophobic is essential for the production of high-quality moulded ceramics. In our paper, the efficiency of the application and the chemisorption of protective monomolecular layers of a long-chain carboxylic acid or its salts will be presented. The effect of the powder treatment on the shear viscosity and the viscoelastic properties of the suspensions for LPIM as well as on their stability in terms of the detrimental effect of water will be discussed.
publisher SPRINGER
issn 0035-4511
year published 2004
volume 43
issue 5
beginning page 559
ending page 566
digital object identifier (doi) 10.1007/s00397-004-0401-8
web of science category Mechanics
subject category Mechanics
unique article identifier WOS:000225051800018
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