ZnO ceramic sintering and luminescence properties
|Larisa Grigorjeva 1, Donats Millers 1, Krisjanis Smits 1, Witold Łojkowski 2, Janusz D. Fidelus 2, Krzysztof Bieńkowski 2, Tadeusz Chudoba 2, Claude J. Monty 3|
1. Institute of Solid State Physics, University of Latvia, 8 Kengaraga, Riga LV-1063, Latvia
The ZnO is well known luminescent material and its properties have been intensively studied due to the progress in preparation of nanostructured material. ZnO crystal luminescence satisfies the requirements to special characteristics of fast scintillators: high light output in subnanosecond time, low afterglow, high density and radiation resistance, suitable emission wavelength. However the crystal cost is very high. ZnO ceramic was known as varistor material. At the same time the ZnO ceramic will be applied as a material for fast scintillator. The goal of present study is the developing of the nanoparticle preparation technology and the ceramic sintering process (especially for obtaining transparent ceramic) as well as to understand the scintillation process in ZnO nanopowders and ceramics.
Simple high temperature sintering (14000C, 1-3 min) and high pressure low temperature sintering (8GPa, 3500C, 5 min) were used for ceramic preparation. The grains of obtained ceramics were ~1 µm and 100 nm, accordingly.
The SEM, XRD and time-resolved luminescence methods were used for obtained ceramic testing.
The work was partly supported by grants 05.0026 and no. N N508 0851 33 of MNiSW granted for the years 2007 – 2009
Presentation: Poster at E-MRS Fall Meeting 2008, Symposium I, by Larisa Grigorjeva
See On-line Journal of E-MRS Fall Meeting 2008
Submitted: 2008-05-19 18:32 Revised: 2009-06-07 00:48