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Journal of Advanced Ceramics 2023, 12(5): 1015-1032 https://doi.org/10.26599/JAC.2023.9220735
Research Article | Open Access | Issue | Published: 04 May 2023

Reactive SPS of Al2O3–RE:YAG (RE = Ce; Ce+Gd) composite ceramic phosphors

Show Author's Information Denis Yu. Kosyanova,b( ),  Anastasia A. Vornovskikha,  Oleg O. Shichalina,  Evgeniy K. Papynova,  Anton A. Belova,  Aleksandra A. Kosianovaa,  Aleksandr N. Fedoretsa,  Andrei A. Leonovb,  Alexey P. Zavjalova,c,  Sergey A. Tikhonova,d,  Yanbin Wange,  Ziqiu Chenge,  Xin Liue,f,  Jiang Lie,f( )
Far Eastern Federal University, Vladivostok 690922, Russia
Institute of Automation and Control Processes, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok 690041, Russia
Laboratory of Methods of Synchrotron Radiation, Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630128, Russia
Kamchatka Branch of Geophysical Survey of the Russian Academy of Sciences, Petropavlovsk-Kamchatsky 683006, Russia
Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Keywords:
microstructure, luminescence performance, alumina–Ce3+-doped yttrium aluminium garnet (Al2O3–Ce:YAG) ceramic phosphors, reactive spark plasma sintering (SPS), structural-phase states
Cite this article:
Kosyanov DY, Vornovskikh AA, Shichalin OO, et al. Reactive SPS of Al2O3–RE:YAG (RE = Ce; Ce+Gd) composite ceramic phosphors. Journal of Advanced Ceramics, 2023, 12(5): 1015-1032. https://doi.org/10.26599/JAC.2023.9220735
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Abstract Full text About this article

Ultrafine-grained Al2O3–rare earth:yttrium aluminium garnet (Al2O3–RE:YAG) (RE = Ce; Ce+Gd) composite ceramics were obtained for the first time by reactive spark plasma sintering (SPS) using commercially available initial oxide powders. The effect of key sintering parameters (temperature, dwell time, and external pressure (Pload)) on densification peculiarities, structural-phase states, and luminescent properties of composites was studied comprehensively. Differences in phase formation and densification between Ce-doped and Ce,Gd-codoped systems were shown. Parameters of reactive SPS, at which there is partial melting with the formation of near-eutectic zones of the Al2O3–YAG system/coexistence of several variations of the YAG-type phase, were established. Pure corundum–garnet biphasic ceramics with an optimal balance between microstructural and luminescence performance were synthesized at 1425 ℃/30 min/30–60 MPa. The external quantum efficiency (EQE) of the phosphor converters reached 80.7% and 72% with close lifetime of ~63.8 ns, similar to those of commercial Ce:YAG materials, which is promising for further applications in the field of high-power white light-emitting diodes (WLEDs) and laser diodes (LDs).


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About this article

Reactive SPS of Al2O3–RE:YAG (RE = Ce; Ce+Gd) composite ceramic phosphors

Show Author's information Denis Yu. Kosyanova,b( ), Anastasia A. Vornovskikha, Oleg O. Shichalina, Evgeniy K. Papynova, Anton A. Belova, Aleksandra A. Kosianovaa, Aleksandr N. Fedoretsa, Andrei A. Leonovb, Alexey P. Zavjalova,c, Sergey A. Tikhonova,d, Yanbin Wange, Ziqiu Chenge, Xin Liue,f, Jiang Lie,f( )
Far Eastern Federal University, Vladivostok 690922, Russia
Institute of Automation and Control Processes, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok 690041, Russia
Laboratory of Methods of Synchrotron Radiation, Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630128, Russia
Kamchatka Branch of Geophysical Survey of the Russian Academy of Sciences, Petropavlovsk-Kamchatsky 683006, Russia
Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Abstract

Ultrafine-grained Al2O3–rare earth:yttrium aluminium garnet (Al2O3–RE:YAG) (RE = Ce; Ce+Gd) composite ceramics were obtained for the first time by reactive spark plasma sintering (SPS) using commercially available initial oxide powders. The effect of key sintering parameters (temperature, dwell time, and external pressure (Pload)) on densification peculiarities, structural-phase states, and luminescent properties of composites was studied comprehensively. Differences in phase formation and densification between Ce-doped and Ce,Gd-codoped systems were shown. Parameters of reactive SPS, at which there is partial melting with the formation of near-eutectic zones of the Al2O3–YAG system/coexistence of several variations of the YAG-type phase, were established. Pure corundum–garnet biphasic ceramics with an optimal balance between microstructural and luminescence performance were synthesized at 1425 ℃/30 min/30–60 MPa. The external quantum efficiency (EQE) of the phosphor converters reached 80.7% and 72% with close lifetime of ~63.8 ns, similar to those of commercial Ce:YAG materials, which is promising for further applications in the field of high-power white light-emitting diodes (WLEDs) and laser diodes (LDs).

Keywords: microstructure, luminescence performance, alumina–Ce3+-doped yttrium aluminium garnet (Al2O3–Ce:YAG) ceramic phosphors, reactive spark plasma sintering (SPS), structural-phase states

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Received: 22 November 2022
Revised: 21 February 2023
Accepted: 24 February 2023
Published: 04 May 2023
Issue date: May 2023

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© The Author(s) 2023.

Acknowledgements

This work was supported by the Russian Science Foundation (No. 20-73-10242). Also, this work was partially supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDA22010301), the International Partnership Program of Chinese Academy of Sciences (No. 121631KYSB20200039), and the International Cooperation Project of Shanghai Science and Technology Commission (No. 20520750200). Denis Yu. Kosyanov is grateful to the Council on grants of the President of the Russian Federation (No. SP-3221.2022.1) for supporting the studies devoted to obtaining advanced ceramic materials. The SR XRD measurements were done at the shared research center SSTRC on the basis of the VEPP-4–VEPP-2000 complex at the Budker Institute of Nuclear Physics SB RAS.

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