Effects of heat-treatment with a flux under reduced atmosphere on photoluminescence of green emitting (Ba, Sr)2SiO4:Eu2+ Phosphors

Tetsufumi Komukai, Jun Yokoyama, Yasushi Sato, Hideki Kato, Masato Kakihana

Research output: Contribution to journalArticlepeer-review

Abstract

The effects of heat-Treatments with various conditions such as temperature, atmosphere on photoluminescence properties of (Ba, Sr)2SiO4:Eu2+ phosphors were investigated in detail. The change of Photoluminescence and XRD pattern of (Ba, Sr)2SiO4:Eu2+ phosphors heat-Treated at various temperatures revealed that the reduction from Eu3+ to Eu2+ in the precursor powder was effectively promoted at the temperatures higher than melting temperature of fluxing agent. We also found that photoluminescence properties and particle shape of (Ba, Sr)2SiO4:Eu2+ phosphors were deeply affected by the incomplete reduction of Eu (Eu3+→Eu2+) and fluxing effect of BaCl2, and they were caused by a very small quantity of oxygen gas under reduced atmosphere.

Original languageEnglish
Pages (from-to)855-860
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume63
Issue number10
DOIs
Publication statusPublished - 2016 Sep

Keywords

  • (Ba
  • Flux
  • Heat treatment
  • Phosphor
  • Reduction
  • Sr)SiO:Eu

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Effects of heat-treatment with a flux under reduced atmosphere on photoluminescence of green emitting (Ba, Sr)<sub>2</sub>SiO<sub>4</sub>:Eu<sub>2+</sub> Phosphors'. Together they form a unique fingerprint.

Cite this