Effect of Sc substitution on the phase composition,microstructure,and properties of(Tb_(1−x)Sc_(x))_(3)(Al_(1−y)Sc_(y))_(2)Al_(3)O_(12) transparent ceramics  

作　　者：Lixuan Zhang Chen Hu Xiao Li Zhenzhen Zhou Tingsong Li Yiyang Liu Lexiang Wu Jiang Li 

机构地区：[1]Transparent Ceramics Research Center,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341000,China

出　　处：《Journal of Advanced Ceramics》2024年第9期1442-1452,共11页先进陶瓷（英文）

基　　金：supported by the National Key R&D Program of China(Grant No.2023YFB3812000);the General Project of Shanghai Natural Science Foundation(Grant No.22ZR1471500);the Prospective Basic Research and Applied Basic Research of Hengdian Group.

摘　　要：Terbium aluminum garnet(Tb_(3)Al_(5)O_(12);TAG)ceramics are among the most promising magneto–optical materials owing to their outstanding comprehensive performance.Many works have focused on improving the optical quality of TAG ceramics.A key point for improving optical quality is ensuring the accuracy of the stoichiometric ratio and avoiding secondary phases.In this work,0,2,4,or 6 wt%Sc_(2)O_(3) was added to the TAG ceramics to increase the solid solubility.The effects of Sc substitution on the crystal structure,sintering process,microstructure,optical transmittance,and magneto–optical properties of(Tb_(1−x)Sc_(x))_(3)(Al_(1−y)Sc_(y))_(2)Al_(3)O_(12)(TSAG)ceramics are studied in detail.4 wt%Sc2O3:TAG ceramics with an in-line transmittance of 82.2%at 1064 nm and 81.2%at 633 nm were successfully fabricated,and the Verdet constant was 164.4 rad·T^(−1)·m^(−1) at 633 nm.Anti-site defects(ADs)and Sc replacement in TAG are further studied via first-principles calculations to determine the working mechanism of Sc.Both the experimental and calculation results show that the introduction of Sc can effectively increase the solid solubility of TAG ceramics,suppress secondary phases,and hence improve the optical transmittance.

关 键 词：terbium aluminum garnet ceramics magneto-optical materials microstructures anti-site defects(ADs) firstprinciples calculations 

分 类 号：TQ174.1[化学工程—陶瓷工业]