Article
Version 1
Preserved in Portico This version is not peer-reviewed
Synthesis and Sintering of ZnO Nanopowders
Version 1
: Received: 14 April 2017 / Approved: 14 April 2017 / Online: 14 April 2017 (12:11:50 CEST)
A peer-reviewed article of this Preprint also exists.
Aimable, A.; Goure Doubi, H.; Stuer, M.; Zhao, Z.; Bowen, P. Synthesis and Sintering of ZnO Nanopowders. Technologies 2017, 5, 28. Aimable, A.; Goure Doubi, H.; Stuer, M.; Zhao, Z.; Bowen, P. Synthesis and Sintering of ZnO Nanopowders. Technologies 2017, 5, 28.
Abstract
Nanopowders are continuously under investigation as they open new perspectives in numerous fields. There are two main challenges to stimulate their development: sufficient low-cost high throughput synthesis methods leading to a production with well-defined and reproducible properties, and for ceramics, conservation of their nanostructure after sintering. In this context, this paper presents the synthesis of a pure nanosized powder of ZnO (dv50 ~ 60 nm, easily redispersable) by using a continuous Segmented Flow Tubular Reactor (SFTR), which has previously shown its versatility and its robustness, ensuring a high powder quality and reproducibility over time. A higher scale of production can be achieved based on a “scale-out” concept by replicating the tubular reactors. The sinterability of ZnO nanopowders synthesized by the SFTR was studied, by natural sintering at 900 °C and 1100 °C, and Spark Plasma Sintering (SPS) at 900 °C. The performances of the synthesized nanopowder were compared to a commercial ZnO nanopowder of high quality. The samples obtained from the synthesized nanopowder could not be densified at low temperature by traditional sintering, whereas SPS led to a fully dense material after only 5 minutes at 900 °C, while limiting the grain growth and thus leading to a nanostructured material.
Keywords
ZnO; ceramic nanopowders; Segmented Flow Tubular Reactor (SFTR); Spark Plasma Sintering (SPS)
Subject
Chemistry and Materials Science, Nanotechnology
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Comments (0)
We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.
Leave a public commentSend a private comment to the author(s)
* All users must log in before leaving a comment