Structure and luminescence properties of porous alumina templates doped with rare earth elements and transition metals
We propose to develop phosphor materials on the basis of porous alumina templates doped with rare earth elements and transition metals. This issue is especially important in connection with the development of random lasers, since the scattering properties of the porous template can de controlled...
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D.Ghitu Institute of Electronic Engineering and Nanotechnologies
2009
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oai:doaj.org-article:f5bfecb2d80949d594fbc4f0025450a72021-11-21T12:05:23ZStructure and luminescence properties of porous alumina templates doped with rare earth elements and transition metals 2537-63651810-648Xhttps://doaj.org/article/f5bfecb2d80949d594fbc4f0025450a72009-05-01T00:00:00Zhttps://mjps.nanotech.md/archive/2009/article/4114https://doaj.org/toc/1810-648Xhttps://doaj.org/toc/2537-6365We propose to develop phosphor materials on the basis of porous alumina templates doped with rare earth elements and transition metals. This issue is especially important in connection with the development of random lasers, since the scattering properties of the porous template can de controlled by tailoring its morphology. In this work, we demonstrate that, apart from the morphology, the crystallographic structure of the template can be controlled by the conditions of post-anodization thermal treatment applied for the activation of the impurity impregnated from rare earth or transition metal containing solutions. The initially amorphous alumina structure is transformed into a γ-Al2O3 phase by annealing at 300–700°C. A δ-Al2O3 phase is predominant in samples annealed at 800–1000°C. The samples annealed at temperatures above 1100°C exhibit an α-Al2O3 structure. The technological conditions related to the solution concentration and duration of impregnation, postimpregnation annealing temperature and annealing duration were optimized from the point of view of maximum impurity ion activation. Enachi, MihailTrofim, ViorelTighineanu, IonCoseac, ValeriuUrsachi, VeaceslavD.Ghitu Institute of Electronic Engineering and NanotechnologiesarticlePhysicsQC1-999ElectronicsTK7800-8360ENMoldavian Journal of the Physical Sciences, Vol 8, Iss 2, Pp 207-213 (2009) |
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DOAJ |
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EN |
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Physics QC1-999 Electronics TK7800-8360 |
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Physics QC1-999 Electronics TK7800-8360 Enachi, Mihail Trofim, Viorel Tighineanu, Ion Coseac, Valeriu Ursachi, Veaceslav Structure and luminescence properties of porous alumina templates doped with rare earth elements and transition metals |
| description |
We propose to develop phosphor materials on the basis of porous alumina templates
doped with rare earth elements and transition metals. This issue is especially important in connection with the development of random lasers, since the scattering properties of the porous
template can de controlled by tailoring its morphology. In this work, we demonstrate that, apart
from the morphology, the crystallographic structure of the template can be controlled by the
conditions of post-anodization thermal treatment applied for the activation of the impurity impregnated from rare earth or transition metal containing solutions. The initially amorphous alumina structure is transformed into a γ-Al2O3 phase by annealing at 300–700°C. A δ-Al2O3 phase
is predominant in samples annealed at 800–1000°C. The samples annealed at temperatures
above 1100°C exhibit an α-Al2O3 structure. The technological conditions related to the solution
concentration and duration of impregnation, postimpregnation annealing temperature and annealing duration were optimized from the point of view of maximum impurity ion activation.
|
| format |
article |
| author |
Enachi, Mihail Trofim, Viorel Tighineanu, Ion Coseac, Valeriu Ursachi, Veaceslav |
| author_facet |
Enachi, Mihail Trofim, Viorel Tighineanu, Ion Coseac, Valeriu Ursachi, Veaceslav |
| author_sort |
Enachi, Mihail |
| title |
Structure and luminescence properties of
porous alumina templates doped with
rare earth elements and transition metals
|
| title_short |
Structure and luminescence properties of
porous alumina templates doped with
rare earth elements and transition metals
|
| title_full |
Structure and luminescence properties of
porous alumina templates doped with
rare earth elements and transition metals
|
| title_fullStr |
Structure and luminescence properties of
porous alumina templates doped with
rare earth elements and transition metals
|
| title_full_unstemmed |
Structure and luminescence properties of
porous alumina templates doped with
rare earth elements and transition metals
|
| title_sort |
structure and luminescence properties of
porous alumina templates doped with
rare earth elements and transition metals |
| publisher |
D.Ghitu Institute of Electronic Engineering and Nanotechnologies |
| publishDate |
2009 |
| url |
https://doaj.org/article/f5bfecb2d80949d594fbc4f0025450a7 |
| work_keys_str_mv |
AT enachimihail structureandluminescencepropertiesofporousaluminatemplatesdopedwithrareearthelementsandtransitionmetals AT trofimviorel structureandluminescencepropertiesofporousaluminatemplatesdopedwithrareearthelementsandtransitionmetals AT tighineanuion structureandluminescencepropertiesofporousaluminatemplatesdopedwithrareearthelementsandtransitionmetals AT coseacvaleriu structureandluminescencepropertiesofporousaluminatemplatesdopedwithrareearthelementsandtransitionmetals AT ursachiveaceslav structureandluminescencepropertiesofporousaluminatemplatesdopedwithrareearthelementsandtransitionmetals |
| _version_ |
1718419281538973696 |