Effects of NH4Cl flux on the characteristics of yttrium oxide phosphor particles with a spherical shape

Hye Young Koo, Seung Kwon Hong, Yun Chan Kang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

High brightness Y2O3:Eu phosphor particles with a spherical shape and fine size were prepared by spray pyrolysis from spray solutions with polymeric precursors, a drying control chemical additive and ammonium chloride flux. The phosphor particles prepared from the spray solution with the ammonium chloride flux had a hollow and porous structure after post-treatment. However, the phosphor particles prepared from the spray solution with polymeric precursors, a drying control chemical additive and ammonium chloride flux had a spherical shape and filled inner structure after post-treatment. The optimum content of the NH4Cl flux showing the maximum photoluminescence intensity of the Y2O3:Eu phosphor particles was 6 wt%. The improvement of the photoluminescence intensity of the Y2O3:Eu phosphor particles by additions of ammonium chloride flux, polymeric precursors and a drying control chemical additive into the spray solution was 37%.

Original languageEnglish
Pages (from-to)243-247
Number of pages5
JournalJournal of Ceramic Processing Research
Volume8
Issue number4
Publication statusPublished - 2007

Keywords

  • Flux material
  • Phosphor
  • Photoluminescence
  • Spray pyrolysis

ASJC Scopus subject areas

  • Ceramics and Composites

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