TY - CHAP
T1 - Synthesis and annealing effects on the structure of alumina by polyol mediated process
AU - Flores González, M. A.
AU - Villanueva-Ibáñez, M.
AU - Hernández-Pérez, M. A.
PY - 2011
Y1 - 2011
N2 - Rare-earth ion (Eu3+ and Tb3+)-doped and undoped aluminum oxide powders have been prepared via polyol mediated synthesis. The precursors were aluminium nitrate, rare-earth (RE: Tb, Eu) nitrate and diethylene glycol. The powders were generated using low-temperature (T max ∼ 200°C) and reaction time of 150 min. By controlling the acidity of the synthesis solution and the precursor concentration, sub-micrometric aggregates (about 300 nm) with spherical morphology were obtained. The powders of RE-doped Al2O3 were further investigated by photon correlation laser, X-ray diffraction, transmission electron microscope, scanning electron microscope, thermal analysis and photoluminescence emission spectra. The results showed that α-Al 2O3 is formed at a temperature significantly lower than the solid sate reaction route. The luminescence of Al2O3 doped with 5 at.% Eu was observed with emission band in 614 nm and Al 2O3 doped with 5 at.% Tb showed an emission band in 544 nm.
AB - Rare-earth ion (Eu3+ and Tb3+)-doped and undoped aluminum oxide powders have been prepared via polyol mediated synthesis. The precursors were aluminium nitrate, rare-earth (RE: Tb, Eu) nitrate and diethylene glycol. The powders were generated using low-temperature (T max ∼ 200°C) and reaction time of 150 min. By controlling the acidity of the synthesis solution and the precursor concentration, sub-micrometric aggregates (about 300 nm) with spherical morphology were obtained. The powders of RE-doped Al2O3 were further investigated by photon correlation laser, X-ray diffraction, transmission electron microscope, scanning electron microscope, thermal analysis and photoluminescence emission spectra. The results showed that α-Al 2O3 is formed at a temperature significantly lower than the solid sate reaction route. The luminescence of Al2O3 doped with 5 at.% Eu was observed with emission band in 614 nm and Al 2O3 doped with 5 at.% Tb showed an emission band in 544 nm.
KW - Alumina
KW - Nanopowders
KW - Polyol method
KW - Rare-hearth ions
UR - http://www.scopus.com/inward/record.url?scp=79960414615&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.691.44
DO - 10.4028/www.scientific.net/MSF.691.44
M3 - Capítulo
AN - SCOPUS:79960414615
SN - 9783037851838
T3 - Materials Science Forum
SP - 44
EP - 48
BT - Metastable and Nanostructured Materials IV
PB - Trans Tech Publications Ltd
ER -