Determination of the solid solubility of SrAl2O4 in CaAl2O4 through crystal field-dependent Eu2+ signatures

S. H. Ju, S. G. Kim, J. C. Choi, H. L. Park, S. I. Mho, Taewhan Kim

Research output: Contribution to journalArticle

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Abstract

The solid solubility of the SrAl2O4-CaAl2O4 system was investigated. Both XRD patterns and cathodoluminescence from Eu2+ in the host lattices were utilized to investigate the solid solubility of SrAl2O4 in CaAl2O4. A single phase exists in the range x = 1 to x = 0.5 in Sr1-xCaxAl2O4 composition (i.e., the [CaAl2O4] phase exists as a single phase from CaAl2O4 to Sr0.5Ca0.5Al2O4). The luminescence band maximum of Eu2+ in [CaAl2O4] phase shifts from 433 nm (CaAl2O4:Eu2+) to 404 nm (Sr0.9Ca0.1Al2O4:Eu2+). The blue-shift behavior of Eu2+ emission can be explained in terms of Eu2+ experiencing the weakening of crystal field strength with the decreasing x value of Sr1-xCaxAl2O4:Eu2+ (0.01%). This phenomenon confirms that Blasse's prediction regarding the Eu2+ crystal field-dependent 4f65D1 energy level is applicable in oxide hosts.

Original languageEnglish
Pages (from-to)1905-1909
Number of pages5
JournalMaterials Research Bulletin
Volume34
Issue number12
DOIs
StatePublished - 1999 Jan 1

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crystal field theory
solubility
Solubility
signatures
Crystals
Cathodoluminescence
cathodoluminescence
blue shift
Phase shift
Oxides
Electron energy levels
Luminescence
field strength
phase shift
energy levels
luminescence
oxides
predictions
Chemical analysis

Cite this

Ju, S. H. ; Kim, S. G. ; Choi, J. C. ; Park, H. L. ; Mho, S. I. ; Kim, Taewhan. / Determination of the solid solubility of SrAl2O4 in CaAl2O4 through crystal field-dependent Eu2+ signatures. In: Materials Research Bulletin. 1999 ; Vol. 34, No. 12. pp. 1905-1909.
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Determination of the solid solubility of SrAl2O4 in CaAl2O4 through crystal field-dependent Eu2+ signatures. / Ju, S. H.; Kim, S. G.; Choi, J. C.; Park, H. L.; Mho, S. I.; Kim, Taewhan.

In: Materials Research Bulletin, Vol. 34, No. 12, 01.01.1999, p. 1905-1909.

Research output: Contribution to journalArticle

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AU - Kim, S. G.

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AU - Mho, S. I.

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N2 - The solid solubility of the SrAl2O4-CaAl2O4 system was investigated. Both XRD patterns and cathodoluminescence from Eu2+ in the host lattices were utilized to investigate the solid solubility of SrAl2O4 in CaAl2O4. A single phase exists in the range x = 1 to x = 0.5 in Sr1-xCaxAl2O4 composition (i.e., the [CaAl2O4] phase exists as a single phase from CaAl2O4 to Sr0.5Ca0.5Al2O4). The luminescence band maximum of Eu2+ in [CaAl2O4] phase shifts from 433 nm (CaAl2O4:Eu2+) to 404 nm (Sr0.9Ca0.1Al2O4:Eu2+). The blue-shift behavior of Eu2+ emission can be explained in terms of Eu2+ experiencing the weakening of crystal field strength with the decreasing x value of Sr1-xCaxAl2O4:Eu2+ (0.01%). This phenomenon confirms that Blasse's prediction regarding the Eu2+ crystal field-dependent 4f65D1 energy level is applicable in oxide hosts.

AB - The solid solubility of the SrAl2O4-CaAl2O4 system was investigated. Both XRD patterns and cathodoluminescence from Eu2+ in the host lattices were utilized to investigate the solid solubility of SrAl2O4 in CaAl2O4. A single phase exists in the range x = 1 to x = 0.5 in Sr1-xCaxAl2O4 composition (i.e., the [CaAl2O4] phase exists as a single phase from CaAl2O4 to Sr0.5Ca0.5Al2O4). The luminescence band maximum of Eu2+ in [CaAl2O4] phase shifts from 433 nm (CaAl2O4:Eu2+) to 404 nm (Sr0.9Ca0.1Al2O4:Eu2+). The blue-shift behavior of Eu2+ emission can be explained in terms of Eu2+ experiencing the weakening of crystal field strength with the decreasing x value of Sr1-xCaxAl2O4:Eu2+ (0.01%). This phenomenon confirms that Blasse's prediction regarding the Eu2+ crystal field-dependent 4f65D1 energy level is applicable in oxide hosts.

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