Pattern Formation during Current Sintering - ExperimentsWednesday (26.09.2018) 16:45 - 17:00 S1/03 - 283 Part of:
Current sintering is a common method for the densification of nanoparticles to engineer highly-dense materials while preserving the microstructure. In the present work, a newly discovered phenomena of current sintering is examined which is the formation of ordered, periodic structures. These patterns occur in aluminum doped zinc oxide during current sintering and consist of alternating bands that differ mainly in the presence or absence of the Zn-Al-spinel phase. In order to explore the conditions under which these bands appear nanoparticles were synthesized by CVS, sintered by CAPAD and characterized via SEM, EDX, XRD and gas adsorption. A feedback mechanism is proposed where a high current density, a low sintering pressure and a high aluminum concentration favors the formation of the patterns.