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@ARTICLE{Dargatz:189585,
author = {Dargatz, Benjamin and Gonzalez, Jesus and Guillon, Olivier},
title = {{I}mproved compaction of {Z}n{O} nano-powder triggered by
the presence of acetate and its effect on sintering},
journal = {Science and technology of advanced materials},
volume = {16},
number = {2},
issn = {1878-5514},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2015-02725},
pages = {025008},
year = {2015},
abstract = {The retention of nanocrystallinity in dense ceramic
materials is still a challenge, even with the application of
external pressure during sintering. The compaction behavior
of high purity and acetate enriched zinc oxide (ZnO)
nano-powders was investigated. It was found that acetate in
combination with water plays a key role during the
compaction into green bodies at moderate temperatures.
Application of constant pressure resulted in a homogeneous
green body with superior packing density $(86\%$ of
theoretical value) at moderate temperature (85 °C) in the
presence of water. In contrast, no improvement in density
could be achieved if pure ZnO powder was used. This
compaction behavior offers superior packing of the
particles, resulting in a high relative density of the
consolidated compact with negligible coarsening. Dissolution
accompanying creep diffusion based matter transport is
suggested to strongly support reorientation of ZnO particles
towards densities beyond the theoretical limit for packing
of ideal monosized spheres. Finally, the sintering
trajectory reveals that grain growth is retarded compared to
conventional processing up to $90\%$ of theoretical density.
Moreover, nearly no radial shrinkage was observed after
sinter-forging for bodies performed with this advanced
processing method.},
cin = {IEK-1 / JARA-ENERGY},
ddc = {690},
cid = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
pnm = {899 - ohne Topic (POF3-899)},
pid = {G:(DE-HGF)POF3-899},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000353641100019},
doi = {10.1088/1468-6996/16/2/025008},
url = {https://juser.fz-juelich.de/record/189585},
}