Elaboration of blue-emitting blue pigments based on Eu2+/Co 2+ codoped BaMgAl10O17 through the heterogeneous distribution of dopants

Shoji Kunimi, Shinobu Fujihara

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Photoluminescence and coloring properties of Eu2+/Co 2+ codoped BaMgAl10O17 were investigated to produce inorganic blue-luminescent pigments. Two kinds of synthesis methods were employed for BaMgAl10O17:Eu2+,Co2+ powders based on a conventional solid-state reaction and a newly developed precipitation method. Powder samples through the solid-state reaction exhibited blue photoluminescence from Eu2+, which was quenched considerably by codoping with Co2+ due to the occurrence of a Eu2+ → Co2+ energy transfer. The precipitation method was then conceived to separate Eu2+ and Co2+ spatially in a BaMgAl 10O17 particle. Powder samples through the precipitation method could be colored blue by optical absorption of Co2+ without degrading blue photoluminescence from Eu2+. The inhomogeneous distribution of the Eu2+/Co2+ dopants in the BaMgAl 10O17 particles was instrumental to the suppression of the Eu2+ → Co2+ energy transfer.

Original languageEnglish
Pages (from-to)49-54
Number of pages6
JournalDyes and Pigments
Issue number1
Publication statusPublished - 2011 Oct


  • Blue pigment
  • Cobalt
  • Energy transfer
  • Europium
  • Photoluminescence
  • Urea

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Process Chemistry and Technology


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