Abstract
The application of X-ray and electron diffractometries are reviewed for the structural analysis of coals and their related matters. After the fundamental nature and the apparatus of X-ray and electron diffraction are briefly stated, it is shown how some structural parameters d002, Lc, n, Ps, E. etc. are obtained from observed profiles. The stack-height distribution and the average number of layers per stack n are calculated by Fourier transformation of the 002 band, and approximate fraction of the carbons contained in stacks Ps is also obtained from the peak intensity of the 002 band, background intensity and n. From the 11 band, the distribution of layer size and their average size La can be calculated by Diamond's method.Diffraction patterns for various ranks of coals are presented, and their characteristics are pointed out. The variation of structural parameters are shown with carbon content of raw coals and with the increase in carbonization temperature. These data are compared with the results of mesophase or carbons carbonized at low temperatures.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
