Processing of aqueous tape-casting of alumina with acrylic emulsion binders
1998; Elsevier BV; Volume: 18; Issue: 4 Linguagem: Inglês
10.1016/s0955-2219(97)00144-1
ISSN1873-619X
AutoresFranck Doreau, G. Tarì, Cécile Pagnoux, Thierry Chartier, J.M.F. Ferreira,
Tópico(s)Pickering emulsions and particle stabilization
ResumoTwo commercial acrylic emulsion binders (Tg= −40°C and Tg=10°C) have been investigated as potential binders for aqueous alumina suspensions for the tape casting process. Coupled with an aqueous low-molecular weight ammonium polyacrylate salt solution as dispersant, they lead to homogeneous systems which seem very compatible. The aqueous suspensions do not show apparent foaming. The suspensions exhibit a typical shear-thinning character with a very few time dependent rheological behaviour, whatever the binder compositions tested. Fabrication of homogeneous green tapes with very smooth surfaces and relative densities above 50% has proven to be relatively easy from these suspensions.
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