SrB4O7:Sm2+: an optical sensor reflecting non-hydrostatic pressure at high-temperature and/or high pressure in a diamond anvil cell |
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Authors: | Chaoshuai Zhao Yan Wang Jianjun Jiang Yu He |
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Affiliation: | 1. Key Laboratory for High-temperature and High-pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, People’s Republic of China;2. College of Earth Sciences, University of Chinese Academy of Sciences, Beijing, People’s Republic of China |
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Abstract: | A systematic investigation on the fluorescent spectra of SrB4O7:Sm2+ was performed in detail at high-temperature up to 623?K and/or high pressure up to 23.2?GPa with different pressure-transmitting media (PTMs), respectively. Combined with experiment data of previous research, the change of the 7D0–5F0 line (0–0 line) full width at half maximum (FWHM) of SrB4O7:Sm2+ under different pressure environments was specifically discussed. The results indicate that the FWHM of 0–0 line is sensitive to the non-hydrostatic pressure environment in 2-propanol, and methanol and ethanol mixture (ME) PTMs at ambient temperature. The first-order and the second-order derivation of the temperature dependence of 0–0 line FWHM at ambient pressure are 1.48(±0.21)?×?10?4?nm/K and 9.63(±0.63)?×?10?7?nm2/K2 below 623?K. The 0–0 line FWHM is also sensitive to the non-hydrostatic pressure environment in ME at high-temperature and high pressure simultaneous, the non-hydrostatic transition pressures are 9.6?GPa at 323?K, 11.0?GPa at 373?K, 14.4?GPa at 423?K, respectively. SrB4O7:Sm2+ is recommended as an optical sensor to reflect the change of pressure environment in liquid media at high-temperature and/or high pressure. |
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Keywords: | SrB4O7:Sm2+ high pressure high-temperature non-hydrostatic pressure FWHM |
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