Articles
  • KCl flux-assisted CaTiO3: Pr3+ red phosphors for temperature sensing

  • Xin Liua, Xiuying Tiana,*, Huiyan Shenga, Changyan Jia, Zhi Huangb, Jin Wena, Hongxia Penga, Ling Zhua, Jing Lia, Ping Liuc, Yangxi Penga and Guowen Lid

  • aModern Industry School of Advanced Ceramics, Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials, School of Materials and Environmental Engineering, Hunan University of Humanities, Science and Technology, Loudi, Hunan, 417000, China
    bNational Electronic Ceramic Product Quality Supervision and Inspection Center, Loudi, Hunan, 417000, China
    cHunan Province Xinhua County Xinxing Electron Ceramics Co., Ltd., Xinhua, Hunan, 417000, China
    dXinhua Shunda Electronic Ceramics Co., Ltd., Xinhua, Hunan, 417000, China

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The red CaTiO3: Pr3+ phosphors were fabricated by employing a solid-state method using KCl flux, and investigated for temperature sensing. There were no structural changes observed with increasing KCl concentration, and no impurities were detected. The obtained crystal structure was identified as an orthorhombic perovskite, belonging to space group of Pnma(62). The typical sample exhibited spherical particles (1-2 μm). The optical bandgap of the sample was measured to be approximately 3.62 eV. Notably, when the KCl concentration reached 3%, the sample exhibited the highest photoluminescence intensity, indicating excellent crystallization strength. They closely resembled the chromaticity coordinates of ideal red light based on CIE chromaticity diagram, and the color purity was determined to be 79.51%. Furthermore, the absolute sensitivity (Sa) was approximately as high as 0.148 K-1, while the relative sensitivity (Sr) reached approximately a high value of 6.57% K-1, which highlights the significant potential of optical thermometry.


Keywords: XRD, Calcium titanate, Praseodymium, Temperature sensing, KCl.

This Article

  • 2024; 25(2): 242-250

    Published on Apr 30, 2024

  • 10.36410/jcpr.2024.25.2.242
  • Received on Dec 15, 2023
  • Revised on Jan 18, 2024
  • Accepted on Jan 24, 2024

Correspondence to

  • Xiuying Tian

  • Modern Industry School of Advanced Ceramics, Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials, School of Materials and Environmental Engineering, Hunan University of Humanities, Science and Technology, Loudi, Hunan, 417000, China
    Tel : +86-0738-8326910 Fax: +86-0738-8326910

  • E-mail: xiuyingt@126.com