Annual Report 2012 - Latvijas Universitātes Cietvielu fizikas institūts
Annual Report 2012 - Latvijas Universitātes Cietvielu fizikas institūts
Annual Report 2012 - Latvijas Universitātes Cietvielu fizikas institūts
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Estonia<br />
Institute of Physics, Tartu (Dr.S.Zazubovich)<br />
Russia<br />
GOI, St.Peterburg (Dr.L.Maksimov)<br />
Poland<br />
Institute of High Pressure Physics, PAN, Warszawa, Poland (Prof.W.Lojkowski,)<br />
France<br />
CNRS Processes, Material and Solar Energy Laboratory, (PROMES), Odeillo<br />
(Dr.C.Monty)<br />
Israel<br />
Prof. A.Gedanken, Bar-Ilan University, Ramat Gan.<br />
Main results<br />
PHOTOCATALYTIC EFFICIENCY STUDIES OF TiO 2 NANOPOWDES<br />
J.Rikveilis, L.Grigorjeva, D.Millers, K.Smits<br />
Experimental results showed that for photocatalytic activity the ratio of anatase to rutile<br />
phase has more significant role than the anatase grain size. The smaller grain size does<br />
not lead to greater performance, possible due to high concentration of surface defects<br />
and electron-hole recombination on surface.<br />
The doping of RE ions lead to anatase grain size decreasing and the photocatalytic<br />
activity decrease.<br />
THE LUMINESCENCE PROPERTIES OF PERSISTENT STRONTIUM<br />
ALUMINATE PHOSPHOR PREPARED BY SOLAR INDUCES SOLID STATE<br />
SYNTHESIS<br />
V.Liepina, K.Smits, D.Millers, L.Grigorjeva, C.Monty<br />
A novel method –solar induced solid state synthesis was carried out and luminescence<br />
properties of aluminate phosphor doped with Eu and Dy were studied. The persistent<br />
phosphor was obtained and its properties were compared with prepared by conventional<br />
solid state reaction.<br />
THE ELECTRON BEAM INDUCED SHORT LIVED ABSORPTION IN<br />
PLZT OPTICAL CERAMICS<br />
D.Millers, V.Dimza, L.Grigorjeva, M.Antonova, K.Smits, M.Livins<br />
The short lived absorption induced by a pulsed electron beam in the led-lanthaniumzirconate-titanate<br />
(PLZT) optical ceramic was studied. The measured absorption<br />
spectrum covers 1.1-2.9 eV energy range and consists of several strongly overlapping<br />
peaks. The rise of the absorption is delayed with respect to the excitation pulse, due to<br />
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