Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 39, Issue 4, Pages 1436-1442Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2018.11.006
Keywords
Ce:YAG ceramic; Spark plasma sintering; Residual porosity; Transparency; Photoluminescence
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Funding
- Israel Ministry of Defense [440243997/634]
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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.
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