Abstract
The presence of Al3+, as an impurity, on the temperature of the polymorphic transformation of pentasodium tripolyphosphate Na5P3O10-II (low-temperature Form-II) into Na5P3O10-I (high-temperature Form-I) has been investigated using X-ray powder diffraction, IR spectroscopy, and scanning electron microscopy methods. The effect of Al3+ on the phase transformation was recorded between ignition temperatures of 350 and 450 °C. Al-free powders, ignited up to 450 °C, did not contain Form-I, while powders containing 0.5 or 1.0 wt % of Al were mixtures of Form-I/Form-II indicating that the presence of Al acted in favor of Form-I formation. Phase composition at temperatures of ignition higher than 500 °C was not dependent on Al presence. Na5P3O10 in all of the products ignited at 500−550 °C, whether Al-free or containing Al, was in Form-I. The presence of Al caused lower crystallinity and inhibited the grain growth of pentasodium tripolyphosphate while powder was ignited. Both phenomena are believed to act in favor ...
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.
