Articles
  • Spectroscopic characteristics of natural fluorite induced by electron-beam irradiation
  • Mihyun Kima, Yongsub Yoonb, Minkyung Kangb and Dongwook Shina,b,*
  • a Department of Materials & Chemical Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea b Division of Materials Science & Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea
Abstract
Naturally synthesized fluorite crystals were investigated in terms of their spectroscopic characteristics to indentify the origin of their colors and dynamics of color variation induced by electron-beam irradiation. Specimens with various colors and shades categorized into four groups were irradiated by an electron beam with two different power densities and subsequently heat-treated at various temperatures and times to investigate the kinetics of the color change process. Various aspects of spectroscopic characteristics before/after e-beam irradiation and heat treatment were analyzed by comparative studies by a UV-V is spectrophotometer, a Fourier transforminfrared spectrometer, an X-ray fluorescence spectrometer, X-ray diffraction, and a photoluminescence spectrometer. The variety of color groups of natural fluorite samples were confirmed to be caused by various defects and F-centers generated by e-beam irradiation.

Keywords: Natural fluorite, Electron-beam irradiation, F-center.

This Article

  • 2012; 13(5): 541-546

    Published on Oct 31, 2012

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