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

被引：18
|
作者：
Kosyanov, Denis Yu [1 ,2 ]
Vornovskikh, Anastasia A. [1 ]
Shichalin, Oleg O. [1 ]
Papynov, Evgeniy K. [1 ]
Belov, Anton A. [1 ]
Kosianova, Aleksandra A. [1 ]
Fedorets, Aleksandr N. [1 ]
Leonov, Andrei A. [2 ]
Zavjalov, Alexey P. [1 ,3 ]
Tikhonov, Sergey A. [1 ,4 ]
Wang, Yanbin [5 ]
Cheng, Ziqiu [5 ]
Liu, Xin [5 ,6 ]
Li, Jiang [5 ,6 ]
机构：
[1] Far Eastern Fed Univ, Vladivostok 690922, Russia
[2] Russian Acad Sci, Far Eastern Branch, Inst Automat & Control Proc, Vladivostok 690041, Russia
[3] Russian Acad Sci, Siberian Branch, Inst Solid State Chem & Mechanochem, Lab Methods Synchrotron Radiat, Novosibirsk 630128, Russia
[4] Russian Acad Sci, Kamchatka Branch, Geophys Survey, Petropavlovsk Kamchatski 683006, Russia
[5] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Transparent Optofunct Inorgan Mat, Shanghai 201899, Peoples R China
[6] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
来源：
JOURNAL OF ADVANCED CERAMICS | 2023年 / 12卷 / 05期
基金：
俄罗斯科学基金会;
关键词：
alumina-Ce3+-doped yttrium aluminium garnet (Al2O3-Ce:YAG) ceramic phosphors; reactive spark plasma sintering (SPS); structural-phase states; microstructure; luminescence performance; LIGHT-EMITTING-DIODES; COLOR-RENDERING INDEX; HIGH-POWER; TRANSPARENT CERAMICS; WHITE LEDS; OPTICAL-PROPERTIES; SINGLE-CRYSTAL; GLASS-CERAMICS; MICROSTRUCTURE; EFFICIENCY;
D O I：
10.26599/JAC.2023.9220735
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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 similar to 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).
引用
收藏
页码：1015 / 1032
页数：18
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