Aging of Pyrotechnic Composition. The reliability of x‐ray diffraction data for estimation of the quality of signal mix

The physical and chemical characteristics of green signal pyrotechnic mix, before and after destabilization caused by the action of increased humidity at different temperatures, were determined. Data obtained by the means of X‐ray diffraction. IR spectroscopy and adiabatic calorimetry were compared with the results acquired by measuring functional characteristics (the dominant wavelength and the colour hue of the emitted light, the intensity of the emission and the rate of burning). Comparision of all of these results points out to the very close relationship between the X‐ray diffraction data and the function of the signal mix. Chemical changes, leading to the disuse of the examinated mix, were recognized as Mg(OH)2, BaCO3 and Ba(NO2)2 formation with concomittant decrease in Mg and Ba(NO3)2 content. Since no changes were observed in separately aged components, the interaction among components proved to be of essential importance. Copyright © 1989 Verlag GmbH & Co. KGaA, Weinheim

Duke Scholars

Author Ines Batinic-Haberle Radiation Oncology