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Stabilization of beta-SrAl2O4 with Eu Prepared by Spray Pyrolysis

Published online by Cambridge University Press:  11 February 2011

W.S. Shi ,
H. Yamada ,
K. Nishikubo ,
H. Kusaba  and
C.N. Xu
W.S. Shi
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), Kyushu, Shuku, 807–1, Tosu, Saga 841–0052, Japan
H. Yamada
Affiliation:
PRESTO, Japan Science and Technology Corporation (JST), 4 Honcho, Kawaguchi 332–0012, Japan
K. Nishikubo
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), Kyushu, Shuku, 807–1, Tosu, Saga 841–0052, Japan
H. Kusaba
Affiliation:
PRESTO, Japan Science and Technology Corporation (JST), 4 Honcho, Kawaguchi 332–0012, Japan
C.N. Xu*
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), Kyushu, Shuku, 807–1, Tosu, Saga 841–0052, Japan PRESTO, Japan Science and Technology Corporation (JST), 4 Honcho, Kawaguchi 332–0012, Japan
*
Corresponding author: [email protected]
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Abstract

The effect of doping europium on the structure of strontium aluminate (SrAl2O4:Eu) synthesized by spray pyrolysis was studied. Results revealed that all of the as-sprayed samples were a mixture structure of monoclinic and hexagonal phases. However, the structural behaviors of the SrAl2O4:Eu post-calcinated at 1300°C in reducing ambient for 2hrs strongly depended on the europium concentrations. As increase of the europium concentrations, a characteristic of hexagonal phase could be observed from the post-annealed samples. Up to 12 percent of strontium were replaced by the europium, the structure of the post-annealed sample achieved a pure hexagonal phase. The mechanism of the phase dependence of the SrAl2O4:Eu on europium concentration was discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 755: Symposium DD – Solid-State Chemistry of Inorganic Materials IV , 2002 , DD11.1
Copyright
Copyright © Materials Research Society 2003

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References

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