中国物理B ›› 2011, Vol. 20 ›› Issue (1): 10703-010703.doi: 10.1088/1674-1056/20/1/010703

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Consistency-dependent optical properties of lubricating grease studied by terahertz spectroscopy

周庆莉1, 施宇蕾1, 赵冬梅1, 张存林1, 赵嵩卿2, 赵卉2, 宝日玛2, 朱守明2, 苗青2, 田璐3, 赵昆3   

  1. (1)Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Department of Physics, Capital Normal University, Beijing 100048, China; (2)College of Science, China University of Petroleum, Beijing 102249, China; (3)State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;College of Science, China University of Petroleum, Beijing 102249, China
  • 收稿日期:2010-06-08 修回日期:2010-08-04 出版日期:2011-01-15 发布日期:2011-01-15
  • 基金资助:
    Project supported by the New Century Excellent Talents in University (Grant No. NCET-08-0841), the National Natural Science Foundation of China (Grant Nos. 60778034, 60877038, and 10804077), the Beijng Natural Science Foundation (Grant No. 4082026), the Research Fund for the Doctoral Program of Higher Education (Grant No. 200804250006), and the State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Grant No. 2008-14).

Consistency-dependent optical properties of lubricating grease studied by terahertz spectroscopy

Tian Lu(田璐)a)b),Zhou Qing-Li(周庆莉)c),Zhao Kun(赵昆)a)b)†, Shi Yu-Lei(施宇蕾)c),Zhao Dong-Mei(赵冬梅)c),Zhao Song-Qing(赵嵩卿)b), Zhao Hui(赵卉)b), Bao Ri-Ma(宝日玛)b),Zhu Shou-Ming(朱守明) b), Miao Qing(苗青)b),and Zhang Cun-Lin(张存林)c)   

  1. a State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China; b College of Science, China University of Petroleum, Beijing 102249, China; c Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Department of Physics, Capital Normal University, Beijing 100048, China
  • Received:2010-06-08 Revised:2010-08-04 Online:2011-01-15 Published:2011-01-15
  • Supported by:
    Project supported by the New Century Excellent Talents in University (Grant No. NCET-08-0841), the National Natural Science Foundation of China (Grant Nos. 60778034, 60877038, and 10804077), the Beijng Natural Science Foundation (Grant No. 4082026), the Research Fund for the Doctoral Program of Higher Education (Grant No. 200804250006), and the State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Grant No. 2008-14).

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摘要： The optical properties of four kinds of lubricating greases (urea, lithium, extreme pressure lithium, molybdenum disulfide lithium greases) with different NLGL (National Lubricant Grease Institute of America) numbers were investigated using terahertz time-domain spectroscopy. Greases with different NLGL grades have unique spectral features in the terahertz range. Comparison of the experimental data with predictions based on Lorentz--Lorenz theory exhibited that the refractive indices of each kind of lubricating grease were dependent on the their consistency. In addition, molybdenum disulfide (MoS2) as a libricant additive shows strong absorption from 0.2 to 1.4 THz, leading to higher absorption of MoS2-lithium grease than that of lithium grease.

关键词: terahertz, lubricating grease, molybdenum disulfide, refractive index

Abstract: The optical properties of four kinds of lubricating greases (urea, lithium, extreme pressure lithium, molybdenum disulfide lithium greases) with different NLGL (National Lubricant Grease Institute of America) numbers were investigated using terahertz time-domain spectroscopy. Greases with different NLGL grades have unique spectral features in the terahertz range. Comparison of the experimental data with predictions based on Lorentz–Lorenz theory exhibited that the refractive indices of each kind of lubricating grease were dependent on the their consistency. In addition, molybdenum disulfide (MoS2) as a libricant additive shows strong absorption from 0.2 to 1.4 THz, leading to higher absorption of MoS2-lithium grease than that of lithium grease.

Key words: terahertz, lubricating grease, molybdenum disulfide, refractive index

中图分类号:  (Optical instruments and equipment)

  • 07.60.-j
42.65.-k (Nonlinear optics) 78.90.+t (Other topics in optical properties, condensed matter spectroscopy and other interactions of particles and radiation with condensed matter) 81.05.-t (Specific materials: fabrication, treatment, testing, and analysis)