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<p>This paper studies the mechanoluminescence (ML) behavior of natural calcite under varying impact velocities to assess its potential use in passive mechanical sensing. Calcite samples obtained from Byrnihat, Meghalaya (26°03′03.8″N 91°52′11.0″E), were analyzed using X‑ray diffraction, field emission scanning electron microscopy, energy-dispersive X‑ray spectroscopy, and Fourier-transform infrared spectroscopy. The analysis confirms the formation of the nanocrystalline hexagonal phase with minor impurities that affect its luminescent properties. When subjected to the mechanical impact, the calcite consistently produces a&#xa0;sharp ML peak around 17 ms, regardless of the impact speed. The emitted light intensity shows a&#xa0;linear dependence on the impact velocity, suggesting a&#xa0;reliable correlation between the mechanical input and optical response. The emission decay follows a&#xa0;first-order exponential pattern, supporting its usefulness for identifying short-duration force events. A&#xa0;plot of time against the logarithm of intensity displays a&#xa0;clear negative slope, supporting this kinetic model. These research findings highlight the potential of natural calcite as a&#xa0;reliable and environmentally friendly material for mechanical sensor applications.</p>

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Effect of different impact velocities on mechano-luminescence of natural calcite for mechanical sensors

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • Wei Peng,
  • Faithfulstar K Bani,
  • Janita Saji,
  • Rocky Maximillian Pohlong Lamare,
  • Guoqing Hu,
  • Vikas Dubey

摘要

This paper studies the mechanoluminescence (ML) behavior of natural calcite under varying impact velocities to assess its potential use in passive mechanical sensing. Calcite samples obtained from Byrnihat, Meghalaya (26°03′03.8″N 91°52′11.0″E), were analyzed using X‑ray diffraction, field emission scanning electron microscopy, energy-dispersive X‑ray spectroscopy, and Fourier-transform infrared spectroscopy. The analysis confirms the formation of the nanocrystalline hexagonal phase with minor impurities that affect its luminescent properties. When subjected to the mechanical impact, the calcite consistently produces a sharp ML peak around 17 ms, regardless of the impact speed. The emitted light intensity shows a linear dependence on the impact velocity, suggesting a reliable correlation between the mechanical input and optical response. The emission decay follows a first-order exponential pattern, supporting its usefulness for identifying short-duration force events. A plot of time against the logarithm of intensity displays a clear negative slope, supporting this kinetic model. These research findings highlight the potential of natural calcite as a reliable and environmentally friendly material for mechanical sensor applications.