TY  - JOUR
AU  - Nur, Khushnuda
AU  - Mishra, Tarini Prasad
AU  - Silva, João Gustavo Pereira da
AU  - Gonzalez-Julian, Jesus
AU  - Bram, Martin
AU  - Guillon, Olivier
TI  - Influence of powder characteristics on cold sintering of nano-sized ZnO with density above 99 %
JO  - Journal of the European Ceramic Society
VL  - 41
IS  - 4
SN  - 0955-2219
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2021-00922
SP  - 2648 - 2662
PY  - 2021
AB  - Cold sintering parameters such as, temperature, pressure, aqueous phase, heating rate and dwelling time has been widely discussed in the literature but the role of starting powder with respective microstructure development is mostly overlooked. There is a need for understanding the effect of powder agglomerates and the role of inter particle friction on the densification behavior during cold sintering process. Present study encompasses investigation and optimization of these parameters for ZnO which enabled > 99 % of relative density with grain sizes below 200 nm. Additionally, role of external atmosphere was also studied to investigate its impact on densification during the process. All cold sintering experiments were carried out in a FAST/SPS device for studying aqueous phase evaporation and ensuring the reproducibility of process parameters. Microstructure characterization (scanning and transmission electron microscopy) showed – without any post heat treatment– defect free grain boundary structure opposite to what documented by previous studies.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000613698100006
DO  - DOI:10.1016/j.jeurceramsoc.2020.11.007
UR  - https://juser.fz-juelich.de/record/890389
ER  -