Journal of Inorganic Materials ›› 2024, Vol. 39 ›› Issue (10): 1107-1113.DOI: 10.15541/jim20240095

Special Issue: 【信息功能】敏感陶瓷(202409)

• RESEARCH ARTICLE • Previous Articles     Next Articles

Preparation and Properties of BaSrGa4O8: Tb3+ Mechanoluminescent Materials

SHI Rui1,2(), LIU Wei1,2,3, LI Lin1,2, LI Huan1,2, ZHANG Zhijun1,2, RAO Guanghui1,2(), ZHAO Jingtai1,2()   

  1. 1. School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
    2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China
    3. School of Mechanical Engineering, Guilin University of Electronic Technology, Guilin 541004, China
  • Received:2024-03-04 Revised:2024-04-17 Published:2024-10-20 Online:2024-05-08
  • Contact: ZHAO Jingtai, professor. E-mail: jtzhao@guet.edu.cn;
    RAO Guanghui, professor. E-mail: rgh@guet.edu.cn
  • About author:SHI Rui (1998-), female, Master candidate. E-mail: sr1399428@163.com
  • Supported by:
    Guangxi Science and Technology Base and Talent Special Project(2020AC18005);Central Government Guide Local Science and Technology Development Fund Project(ZY22096009);Innovation Project of Guangxi Graduate Education(YCSW2022267);Foundation for Guangxi Bagui scholars

Abstract:

Mechanoluminescent (ML) materials, due to their unique mechanical-to-optical energy conversion, hold significant promise in stress sensing and are poised to become the next generation of visual strain-sensing materials. Currently, expanding ML material systems and enhancing their performance remain focal points of research. In this study, a series of Tb3+-doped green ML phosphors was synthesized using BaSrGa4O8 matrix (hexagonal crystal system, space group P63, with a non-centrosymmetric structure) via high-temperature solid-state synthesis. These materials emitted bright green light under various mechanical excitations (tension, compression, and torsion). Clear note mappings were observed by writing B, S, G, O, T, and b on the prepared ML elastomer with a glass rod. By analyzing the colormap, the stress conditions during the writing process could be traced. This is the first observation of ML phenomenon in the above-mentioned matrix doping system. Under 254 nm ultraviolet (UV) excitation, BaSr1-xGa4O8: xTb3+ phosphors exhibited bright green emission at 543 nm, which was attributed to 5D4-7F5 transition of Tb3+, and shared the same luminescent center as ML. The samples continued to display strong long persistent luminescence after UV irradiation was removed. By combining ML, photoluminescence (PL), and long persistent luminescence (LPL) with thermoluminescence (TL) analysis, further insights into their intrinsic connections were elucidated. In conclusion, this study broadens the range of high-performance ML material systems, showcasing potential applications in visual strain sensing, information security, and anti-counterfeiting.

Key words: mechanoluminescence, long persistent luminescence, stress sensing, phosphor

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