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

Avital Wagner; Barak Ratzker; Sergey Kalabukhov; Maxim Sokol; Nachum Frage

doi:10.1016/j.jeurceramsoc.2018.11.006

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

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

Department of Materials Engineering

Ben-Gurion University of the Negev

Research output: Contribution to journal › Article › peer-review

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 language	American English
Pages (from-to)	1436-1442
Number of pages	7
Journal	Journal of the European Ceramic Society
Volume	39
Issue number	4
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2018.11.006
State	Published - 1 Apr 2019

Keywords

Ce:YAG ceramic
Photoluminescence
Residual porosity
Spark plasma sintering
Transparency

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1016/j.jeurceramsoc.2018.11.006

Cite this

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title = "Residual porosity and optical properties of spark plasma sintered transparent polycrystalline cerium-doped YAG",

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.",

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AU - Wagner, Avital

AU - Ratzker, Barak

AU - Kalabukhov, Sergey

AU - Sokol, Maxim

AU - Frage, Nachum

PY - 2019/4/1

Y1 - 2019/4/1

N2 - 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.

AB - 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.

KW - Ce:YAG ceramic

KW - Photoluminescence

KW - Residual porosity

KW - Spark plasma sintering

KW - Transparency

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DO - 10.1016/j.jeurceramsoc.2018.11.006

M3 - Article

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JF - Journal of the European Ceramic Society

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

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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