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Synthesis and characterization of (Ce0.67Tb0.33)MnxMg1-xAl11 O19 phosphors derived by sol-gel processing

  • Junying Zhang*
  • , Zhongtai Zhang
  • , Zilong Tang
  • , Yuanhua Lin
  • *Corresponding author for this work
  • Tsinghua University

Research output: Contribution to journalArticlepeer-review

Abstract

A (Ce0.67Tb0.33)MnxMg1-xAl11 O19 phosphor powder was synthesized, using a simple sol-gel process, by mixing citric acid with CeO2, Tb4O7, Al(NO3)3·9H2O, Mg(OH)2·4MgCO3·6H2O, and Mn(CH3COO)2. The phosphor crystallized completely at 1200°C, and the phosphor particle size was between 1 and 5 μm. The excitation spectrum was characteristic of Ce3+, while the emission spectrum was composed of lines from Tb3+ and Mn2+. The Mn2+ gave a green fluorescence band, and concentration quenching occurred when x > 0.10. The luminescent properties of the phosphor were explained by a configurational coordinate model.

Original languageEnglish
Pages (from-to)998-1000
Number of pages3
JournalJournal of the American Ceramic Society
Volume85
Issue number4
DOIs
StatePublished - Apr 2002
Externally publishedYes

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