Journal of Inorganic Materials ›› 2025, Vol. 40 ›› Issue (2): 215-224.DOI: 10.15541/jim20240322

• Research Letter • Previous Articles    

Yb:Sc2O3 Transparent Ceramics Fabricated from Co-precipitated Nano-powders: Microstructure and Optical Property

YE Junhao1,2(), ZHOU Zhenzhen1,2, HU Chen1,2, WANG Yanbin1,2, JING Yanqiu1,2, LI Tingsong1,2, CHENG Ziqiu1,2, WU Junlin1,2, IVANOV Maxim3,4, HRENIAK Dariusz5, LI Jiang1,2()   

  1. 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. Center of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, 11001 Belgrade, Serbia
    4. Institute of Electrophysics Ural Branch, Russian Academy of Sciences, Ekaterinburg 620016, Russia
    5. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wroclaw 326109, Poland
  • Received:2024-07-08 Revised:2024-09-07 Published:2025-02-20 Online:2024-09-23
  • Contact: LI Jiang, professor. E-mail: lijiang@mail.sic.ac.cn
  • About author:YE Junhao (2000-), male, Master candidate. E-mail: yejunhao22@mails.ucas.ac.cn
  • Supported by:
    National Key R&D Program of China(2023YFE3812005);International Partnership Program of Chinese Academy of Sciences(121631KYSB20200039);National Center for Research and Development(WPC2/1/SCAPOL/2021);Chinese Academy of Sciences President’s International Fellowship Initiative(2024VEA0005);Chinese Academy of Sciences President’s International Fellowship Initiative(2024VEA0014)

Abstract:

Sc2O3, as a host for solid-state laser gain materials, has advantage of high thermal conductivity and easy matching with activating ions, which is promising in high-power laser applications. Currently, Yb-doped Sc2O3 ceramics have been fabricated at very high sintering temperatures, but their optical quality and sintering process still need further improvement. In this work, 5%Yb:Sc2O3 (in mass) nano-powders were obtained by co-precipitation, and then transparent ceramics were fabricated by vacuum pre-sintering and hot isostatic pressing (HIP) post-treatment. The cubic Yb:Sc2O3 nano-powders with good dispersity and an average crystallite of 29 nm were obtained. Influence of pre-sintering temperatures (1500-1700 ℃) on densification process, microstructure changes, and optical transmittance of Yb:Sc2O3 ceramics was detected. Experimental data revealed that all samples have a uniform microstructure, while the average grain sizes increase with the increase of the sintering temperatures. Impressively, the optimum in-line transmittance of Yb:Sc2O3 ceramics, pre-sintered at 1550 ℃ after HIP post-treatment, reaches 78.1% (theoretical value of 80%) at 1100 nm. Spectroscopic properties of the Yb:Sc2O3 ceramics reveal that the minimum population inversion parameter β2 and the luminescence decay time of 5%Yb:Sc2O3 ceramics are 0.041 and 0.49 ms, respectively, which demonstrate that the optical quality of the Yb:Sc2O3 has been improved. Meanwhile, their best vacuum sintering temperature can be controlled down to a lower temperature (1550 ℃). In conclusion, Yb:Sc2O3 nano-powders are successfully synthesized by co-precipitation method, and good optical quality transparent ceramics are fabricated by vacuum pre-sintering at 1550 ℃and HIP post-treatment.

Key words: nano-powder, Yb:Sc2O3, transparent ceramic, hot isostatic pressing, optical property

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