Advertisement

Journal of Materials Science

, Volume 26, Issue 5, pp 1383–1386 | Cite as

Study on attribution of laser Raman spectroscopy for hopeite crystal films

  • Noboru Sato
  • Kenji Watanabe
  • Tatsuo Minai
Papers

Abstract

Laser Raman spectroscopy was applied to clarify the chemical structure of hopeite crystal films. Orthophosphate [PO 4 3− ], which is a regular tetrahedron, has four basic vibration modes, + ν1, ν2, ν3 + of which ν1, and ν3 are observed at 800 to 1300 cm−1. Here, the main peak corresponds to ν1 and the other peaks correspond to ν3 untied and split. A reference sample of 85% H3PO4 showed two peaks in the same region, the main peak corresponding to ν1 and the sub-peak corresponding to ν3 degenerated. It was found that a basic vibration mode of ν3 appears at 1150 cm−1. Raman spectra were observed for hopeite dissolved in HCL solution. Three peaks were found in the region, but the spectral pattern was quite different from that of crystalline hopeite, and was similar to that of H3PO4 aqueous solution. The peak intensity ratio of I1075/I690 differed between liquid-state hopeite and H3PO4 aqueous solution, but the band frequencies of the three peaks were consistent with each other. It was confirmed that the three peaks correspond to the P(OH)3 and PO stretching vibrations of [H3PO4] and the PO2 stretching vibration of [H2PO 4 ] formed by the dissociation of H3PO4. The PO2 stretching vibration observed at 1075 cm−1 depends on the dissociation state of H3PO4.

Keywords

Polymer Orthophosphate Spectroscopy Raman Spectrum Intensity Ratio 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    D. B. Freeman, “Phosphating and Metal Pre-treatment” (Woodhead-Faulkner, London, 1986) p. 1.Google Scholar
  2. 2.
    W. Raush, “Die Phosohatierung von Metallen” (Leuze Verlag, W. Germany, 1974) p. 1.Google Scholar
  3. 3.
    N. Sato, Boshoku Gijutsu 32 (1983) 379.Google Scholar
  4. 4.
    Idem., Surf. Coat. Technol. 30 (1987) 171.CrossRefGoogle Scholar
  5. 5.
    Idem., Kinzoku Hyomen Gijutsu 37 (1986) 758.Google Scholar
  6. 6.
    Idem., ibid. 38 (1987) 30.Google Scholar
  7. 7.
    N. Sato and T. Minami, ibid. 38 (1987) 108.Google Scholar
  8. 8.
    Idem., ibid. 38 (1987) 149.Google Scholar
  9. 9.
    Idem., Nippon Kagaku Kaishi 1987 (1987) 1741.CrossRefGoogle Scholar
  10. 10.
    N. Sato, T. Minami and H. Kono, Kinzoku Hyomen Gijutsu 38 (1987) 571.Google Scholar
  11. 11.
    Idem., Surf. Coat. Technol. 37 (1989) 23.CrossRefGoogle Scholar
  12. 12.
    T. Minami and N. Sato, Hyomen Kagaku 9 (1988) 459.CrossRefGoogle Scholar
  13. 13.
    Idem., Nippon Kagaku Kaishi 1988 (1988) 1727.CrossRefGoogle Scholar
  14. 14.
    Idem., ibid. 1988 (1988) 1891.Google Scholar
  15. 15.
    Idem., J. Mater. Sci. 24 (1989) 3375.CrossRefGoogle Scholar
  16. 16.
    Idem., ibid. 24 (1989) 4419.Google Scholar
  17. 17.
    N. Sato, Nippon Kagaku Kaishi 1989 (1989) 1724.CrossRefGoogle Scholar
  18. 18.
    Nihon Kagaku Kai, in “Kagaku Binran” (Maruzen, Tokyo, 1975) p. 1318.Google Scholar
  19. 19.
    A. J. Sommer and H. Leidheiser, Microbeam Anal. (1984) 111.Google Scholar
  20. 20.
    Nihon Kagaku Kai, in “Kagaku Binran” (Maruzen, Tokyo, 1975) p. 994.Google Scholar
  21. 21.
    T. Kitagawa and A. T. Tu, “Raman Bunko Nyumon” (Kagaku Dojin, Tokyo, 1988) p. 152.Google Scholar
  22. 22.
    E. Steger and K. Herzog, Z. Anorg. Allg. Chem. 331 (1964) 169.CrossRefGoogle Scholar
  23. 23.
    W. A. Adams, C. M. Preston and H. A. M. Chew, J. Chem. Phys. 70 (1979) 2074.CrossRefGoogle Scholar

Copyright information

© Chapman and Hall Ltd. 1991

Authors and Affiliations

  • Noboru Sato
    • 1
  • Kenji Watanabe
    • 2
  • Tatsuo Minai
    • 2
  1. 1.Wako Research CenterHonda R & D Co. LtdWakoJapan
  2. 2.Materials EngineeringHonda Motor Co. LtdSuzukaJapan

Personalised recommendations