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YI De-qi, YANG Rong-jie. Study of Crystal Defects and Spectroscopy Characteristics of Ammonium Polyphosphate[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2009, 18(2): 238-242.
Citation: YI De-qi, YANG Rong-jie. Study of Crystal Defects and Spectroscopy Characteristics of Ammonium Polyphosphate[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2009, 18(2): 238-242.
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Study of Crystal Defects and Spectroscopy Characteristics of Ammonium Polyphosphate

  • School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, China

  • Received Date:2008-03-17
    Abstract
  • Two kinds of commercial ammonium polyphosphate (APP) and three kinds of APP which were prepared in the laboratory were studied by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). In identification of the form Ⅱ crystal APP by XRD and FTIR, some discrepancies were discussed. It is pointed out that the absorbance of the FTIR spectra at 682?cm -1can exist not only in the form Ⅰ APP, but also in the form Ⅱ APP with the crystal lattice defects. The SEM images indicate that the form Ⅱ APP is of multilayer crystal structure. XRD and TEM can reveal the crystal lattice defects.
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