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

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