Dresden 2011 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 31: Postersitzung II

MM 31.38: Poster

Mittwoch, 16. März 2011, 17:15–18:45, P5

Synthesis of ZnO core spike particles as composite fillers with a high throughput method — •Sebastian Wille, Tönjes Koschine, Christoph Chluba, Stefan Freitag, Yogendra Kumar Mishra, and Rainer Adelung — Funktionale Nanomaterialien, CAU Kiel

ZnO core spike particles are typically micro particles covered with nanoscopic spikes. They show advanced properties compared to conventional fillers like roundish particles and short fibers. An example is a very strong mechanical interlocking behaviors. This property together with its hardness makes this material very interesting for compounds with enhanced mechanical properties. In addition ZnO has very interesting electric and electronic properties, which make the range of possible applications for composites containing ZnO core spike particles very wide. In order to use ZnO core spike particles as filler for bulk materials, considerable amounts are necessary. A problem during the oxidation based synthesis of such particles using Zn-powder as source material is the separation of the single Zn-particles, which is necessary for oxygen supply, for avoiding sinter processes and allowing the nanoscopic spikes to grow. We introduce simple processing routes found as solution for this problem. Large amounts of microscopic Zn-powder can be converted to ZnO core spike particles with a total size from nanometers up to a couple of micrometers. Furthermore by changing the growth parameters it is also possible to modify the particle shape.