中国物理B ›› 2003, Vol. 12 ›› Issue (2): 208-210.doi: 10.1088/1009-1963/12/2/316

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Positive deviation from Debye's theory in small-angle x-ray scattering

赵辉1, 董宝中1, 吴忠华1, 李志宏2, 巩雁军2, 吴东2, 孙予罕2   

  1. (1)Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China; (2)State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
  • 收稿日期:2002-06-03 修回日期:2002-08-28 出版日期:2003-02-16 发布日期:2005-03-16
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 29973035), by the National Key Basic Research Special Foundation of China (Grant No G200000480) and by the National Natural Science Priority Project Research Special Foundation of China (Grant No 20133040).

Positive deviation from Debye's theory in small-angle x-ray scattering

Li Zhi-Hong (李志宏)a, Gong Yan-Jun (巩雁军)a, Wu Dong (吴东)a, Sun Yu-Han (孙予罕)a, Zhao Hui (赵辉)b, Dong Bao-Zhong (董宝中)b, Wu Zhong-Hua (吴忠华)b   

  1. a State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China; b Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
  • Received:2002-06-03 Revised:2002-08-28 Online:2003-02-16 Published:2005-03-16
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 29973035), by the National Key Basic Research Special Foundation of China (Grant No G200000480) and by the National Natural Science Priority Project Research Special Foundation of China (Grant No 20133040).

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摘要： The small-angle x-ray scattering (SAXS) resulting from a non-ideal two-phase system having sharply defined phase boundaries but with micro-fluctuations of electron density within any phase shows a positive deviation from Debye's theory. We have found a simple method suitable for fitting the slit-smeared SAXS data and correcting the positive deviation. The validity of this procedure is tested on porous ZrO_2 xerogel prepared using the sol-gel process.

Abstract: The small-angle x-ray scattering (SAXS) resulting from a non-ideal two-phase system having sharply defined phase boundaries but with micro-fluctuations of electron density within any phase shows a positive deviation from Debye's theory. We have found a simple method suitable for fitting the slit-smeared SAXS data and correcting the positive deviation. The validity of this procedure is tested on porous ZrO2 xerogel prepared using the sol-gel process.

Key words: small-angle x-ray scattering, positive deviation from Debye's theory, porous ZrO2 xerogel

中图分类号:  (Gels and sols)

  • 82.70.Gg
78.70.Ck (X-ray scattering) 81.20.Fw (Sol-gel processing, precipitation) 61.43.Gt (Powders, porous materials)