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Reactive SPS of Al_(2)O_(3)–RE:YAG(RE=Ce;Ce+Gd)composite ceramic phosphors

查看全文 作　　者：Denis [1,2]Yu.Kosyanov;Anastasia [1]A.Vornovskikh;Oleg [1]O.Shichalin;Evgeniy [1]K.Papynov;Anton [1]A.Belov;Aleksandra [1]A.Kosianova;Aleksandr [1]N.Fedorets;Andrei [2]A.Leonov;Alexey [1,3]P.Zavjalov;Sergey [1,4]A.Tikhonov;Yanbin [5]Wang;Ziqiu [5]Cheng;Xin [5,6]Liu;Jiang [5,6]Li 高影响力作者 机构地区：[1]Far Eastern Federal University,Vladivostok 690922,Russia;[2]Institute of Automation and Control Processes,Far Eastern Branch of the Russian Academy of Sciences,Vladivostok 690041,Russia;[3]Laboratory of Methods of Synchrotron Radiation,Institute of Solid State Chemistry and Mechanochemistry,Siberian Branch of the Russian Academy of Sciences,Novosibirsk 630128,Russia;[4]Kamchatka Branch of Geophysical Survey of the Russian Academy of Sciences,Petropavlovsk-Kamchatsky 683006,Russia;[5]Key Laboratory of Transparent Opto-functional Inorganic Materials,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China;[6]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China高影响力机构 出　　处：《Journal of Advanced Ceramics》索引2023年第12卷第5期,共18页高影响力期刊 基　　金：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);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. 摘　　要：Ultrafine-grained Al_(2)O_(3)–rare earth:yttrium aluminium garnet(Al_(2)O_(3)–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(P_(load)))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 Al_(2)O_(3)–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). 关 键 词：alumina–Ce^(3+)-doped yttrium aluminium garnet(Al_(2)O_(3)–Ce:YAG)ceramic phosphors reactive spark plasma sintering(SPS) structural-phase states microstructure luminescence performance
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