Cathodoluminescent characteristics of Sm‐doped ZnAl2O4 nanostructured powders

Physica Status Solidi (A) Applications and Materials Science - Tập 202 Số 1 - Trang 102-107 - 2005
Erika Martínez Sánchez1, M. Garcı́a-Hipólito1, J. Guzmán1, F. Ramos‐Brito1, J. Santoyo‐Salazar1, Rafael Martínez-Martínez1, O. Álvarez‐Fregoso, M. I. Ramos‐Cortes2, J. J. Mendez‐Delgado2, C. Falcony2
1Instituto de Investigaciones en Materiales‐UNAM, Apdo. Postal 70‐360, México D.F., Coyoacán 04510, México
2Departamento de Física, CINVESTAV‐IPN, Apdo. Postal 14‐740, 07000, México D.F., México

Tóm tắt

AbstractCathodoluminescent (CL) powders of zinc aluminate activated with samarium ions have been prepared by a co‐precipitation chemical process. Different doping concentrations in the start mixture and sintering temperatures for the precipitated powder were studied. It was observed that the crystalline characteristics of the powders depend upon the sintering temperature. For temperatures higher than 450 °C, the powders presented the cubic spinel phase with a lattice parameter value of 8.0756 Å, and grain sizes from 50 to 100 nm with semispherical shape. The CL emission spectra showed broad bands localized at 564, 602, 644, and 703 nm associated with 4G5/2 → 6H5/2, 4G5/2 → 6H7/2, 4G5/2 → 6H9/2, and 4G5/2 → 6H11/2 transitions in the Sm3+ ions, respectively. Concentration quenching of the cathodoluminescence occurred at about 4.26 at% of the activator (Sm) concentration inside the sintered powders. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Tài liệu tham khảo

10.1111/j.1151-2916.1999.tb02241.x

10.1111/j.1151-2916.2001.tb00938.x

T. K.Shioyama Alcohol dehydratation employing a zinc aluminate catalysis U.S. Patent 4 260 845 (1981).

R.Szymanski Ch.Travers P.Chaumette Ph.Courty andD.Durand Studies in Surface Science Vol. 31 (Elsevier Amsterdam 1987) p. 739.

10.1016/0304-5102(93)85050-4

G.KhareandR. A.Porter Platinum and tin containing catalyst and use thereof in alkane dehydrogenation U.S. Patent 5 430 220 (1995).

Aguilar‐Rios G., 1995, Appl. Catal. A, 127

10.1111/j.1151-2916.1995.tb07957.x

10.1007/BF00738651

10.1111/j.1151-2916.1965.tb14679.x

10.1016/0965-9773(95)00025-9

10.1111/j.1151-2916.1981.tb15908.x

Powder diffraction file card No. 5‐669 International Center for Diffraction Data (1990).

G.BlasseandB. C.Grabmaier Luminescent Materials (Springer Berlin 1994).

10.1149/1.2408087

T.Hase T.Kano E.Nakasawa andH.Yamamoto in: Phosphor materials for cathode‐ray tubes edited by P. W. Hawkes Advanced in Electronics and Electron Physics Vol. 79 (Academic Press New York 1990) p. 271.

10.1016/0022-2313(83)90036-4

10.1143/JJAP.19.41

10.1016/0009-2614(95)00601-Y

10.1088/0957-4484/15/1/015

10.1016/S0025-5408(02)01068-1

10.1016/0022-2313(92)90076-L

S.Myhajlenco in: Luminescence of Solids edited by D. R. Vij (Plenum Press New York 1998) chap. 4.

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Physica Status Solidi (A) Applications and Materials Science

Tập 202 Số 1

102-107

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