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Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: Two-Peak Emission Behavior of 12CaO·7Al2O3:Eu3+
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 1956-1958)
Author(s): Duan-ting Yan, Center for Advanced Opto-electronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun,
Dan Wang, Center for Advanced Opto-electronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun,
Yu-xue Liu, Center for Advanced Opto-electronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun,
Chun-guang Liu, Center for Advanced Opto-electronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun,
Chang-shan Xu, Center for Advanced Opto-electronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun,
Yi-chun Liu, Center for Advanced Opto-electronic Functional Materials Research, School of Physics, Northeast Normal University, Changchun,
Abstract: 12CaO·7Al2O3:Eu powders were prepared by a chemical co-precipitation method. Stoichiometric Al(NO3)3·9H2O and CaCl2 were dissolved in deionized water, then the stoichiometric Eu(NO3)3 aqueous solution was added to the mixed aqueous solution under magnetic stirring. The ammonia solution was added to the mixed aqueous solution until a white sol was obtained. 12CaO·7Al2O3:Eu powders were obtained after the sol precursor were annealed at 1100 °C for 8 hours in air. From the excitation spectra and sites selective excitation spectra, the Eu3+ ions should occupy two types of sites in the C12A7 host. Maybe they are related to two types of Ca sites or to different charge compensation structures.
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