Affiliation:
1. Ceramic Department, Materials and Energy Research Center, Karaj, Alborz, Iran
Abstract
In the present work, different conditions, such as PVA content as a high
molecular weight polymer, Dolapix CE64 level with a lower molecular weight
and pH adjusted by HCl, were investigated for the preparation of the
yttria-stabilized zirconia (YSZ) granules from nanosized YSZ particles. It
was found that the suspension prepared at pH = 4 and with 0.1 wt.% Dolapix
CE64 has a reasonable value of viscosity for spray drying. The morphology of
granules and their cross-sections were characterized through microstructural
observation. The flowability of the prepared granules and the Hausner ratio
were also evaluated. The results indicated that the addition of only 0.1
wt.% of PVA binder and the use of Dolapix can produce the YSZ granules with
good flowability. Replacement of PAA by Dolapix has the benefits of
achieving uniform granules with a dense shell layer, decreasing the amount
of binder and accelerating the feeding rate of suspensions. The mechanism of
the solid and hollow granule formation by a low molecular weight dispersant
was suggested.
Publisher
National Library of Serbia
Cited by
3 articles.
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