Residual porosity and optical properties of spark plasma sintered transparent polycrystalline cerium-doped YAG

Avital Wagner, Barak Ratzker, Sergey Kalabukhov, Maxim Sokol*, Nachum Frage

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Transparent cerium-doped yttrium aluminum garnet (Ce:YAG) phosphors are promising candidates for high-power white light emitting diode applications. In the present study, Ce:YAG powder was synthesized by a co-precipitation method and highly transparent ceramics were fabricated by spark plasma sintering. The effects of temperature and pressure, as well as post-sintering treatments (annealing or hot isostatic pressing), on residual porosity were studied by electron and confocal laser microscopy. Correlation between residual porosity characteristics (pore size and volume fraction) and optical properties (in-line transmittance and photoluminescence intensity) of the luminescent transparent ceramics was established.

Original languageEnglish
Pages (from-to)1436-1442
Number of pages7
JournalJournal of the European Ceramic Society
Volume39
Issue number4
DOIs
StatePublished - Apr 2019
Externally publishedYes

Funding

FundersFunder number
Ministry of Defense440243997/634

    Keywords

    • Ce:YAG ceramic
    • Photoluminescence
    • Residual porosity
    • Spark plasma sintering
    • Transparency

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