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Interaction between binder and powder in injection moulding of alumina

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Abstract

In injection moulding of alumina the binder components interacted with the alumina powder by a Lewis acid-base reaction. Among the binder components used, stearic acid played a major role in determining the process behaviour even though its composition was only 4 wt% of the total binder (1.8 vol% of the formulation including powder). The effects of the chemisorbed stearic acid due to the Lewis acid-base interaction were a reduction of the apparent viscosity by a factor of 20, minimized separation of binder from the powder during moulding, but a higher content of binder burnout residue than in the carbonyl-iron system.

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Authors and Affiliations

  1. Mechanical Engineering Department, National Taiwan Institute of Technology, 10772, Taipei, Taiwan

    S. T. Lin

  2. Engineering Science and Mechanics Department, Pennsylvania State University, 16802, University Park, PA, USA

    R. M. German

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  1. S. T. Lin
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Lin, S.T., German, R.M. Interaction between binder and powder in injection moulding of alumina. J Mater Sci 29, 5207–5212 (1994). https://doi.org/10.1007/BF01151118

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