TY - JOUR
T1 - Properties of Gd2O3:Eu3+, Tb3+ nanopowders obtained by sol-gel process
AU - Ramírez, A. de J.Morales
AU - Murillo, A. García
AU - Romo, F. de J.Carrillo
AU - Hernández, M. García
AU - Vigueras, D. Jaramillo
AU - Chaderyron, G.
AU - Boyer, D.
N1 - Funding Information:
The authors are grateful to Conacyt for financial support projects 47279 and 59408 and the National Polytechnic Institute ( SIP20090546, 20090528 ). Angel Morales R. would also thank CONACyT for the scholarship granted. The authors would like to thank David Nentwick for his editing work on this paper. The authors would also like to thank M. García Murillo for her assistance.
PY - 2010/1
Y1 - 2010/1
N2 - A significant practical application for nanostructured materials is X-ray medical imagery, because it is necessary to use dense materials in order to enable absorption of high energy photons. An important requirement of these materials is UV-vis range emission produced by X-ray excitation, which can be influenced by the particle size. Europium doped gadolinium oxide is a well known red phosphor. Moreover, nanophosphors of Gd2O3 codoped with Tb3+, Eu3+ increase their light yield by energy transfer between Tb3+ and Eu3+. In this study, Gd2O3 nanopowders codoped with Eu3+ and Tb3+ (2.5 at.% Eu3+, and 0.005 and 0.01 at.% Tb3+) were obtained via a sol-gel process using gadolinium pentanedionate as precursor and europium and terbium nitrates as doping sources. In this paper, we report the influence of annealing temperature on the structure, morphology and luminescent properties of Gd2O3:Eu3+, Tb3+ by means of TGA, XRD, TEM and X-ray emission measurements.
AB - A significant practical application for nanostructured materials is X-ray medical imagery, because it is necessary to use dense materials in order to enable absorption of high energy photons. An important requirement of these materials is UV-vis range emission produced by X-ray excitation, which can be influenced by the particle size. Europium doped gadolinium oxide is a well known red phosphor. Moreover, nanophosphors of Gd2O3 codoped with Tb3+, Eu3+ increase their light yield by energy transfer between Tb3+ and Eu3+. In this study, Gd2O3 nanopowders codoped with Eu3+ and Tb3+ (2.5 at.% Eu3+, and 0.005 and 0.01 at.% Tb3+) were obtained via a sol-gel process using gadolinium pentanedionate as precursor and europium and terbium nitrates as doping sources. In this paper, we report the influence of annealing temperature on the structure, morphology and luminescent properties of Gd2O3:Eu3+, Tb3+ by means of TGA, XRD, TEM and X-ray emission measurements.
KW - Ceramics
KW - Optical properties
KW - Powders
KW - Sol-gel chemistry
UR - http://www.scopus.com/inward/record.url?scp=70449089869&partnerID=8YFLogxK
U2 - 10.1016/j.materresbull.2009.09.005
DO - 10.1016/j.materresbull.2009.09.005
M3 - Artículo
SN - 0025-5408
VL - 45
SP - 40
EP - 45
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 1
ER -