ISSN:
0721-3115
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The effect of percentage variation of Mo and KClO4 on Mo-BaCrO4-KClO4 delay system has been studied. The reaction sequence has been investigated by means of thermo-gravimetry (TG): differential thermal analysis (DTA) and X-ray diffraction studies. KClO4 is found to be essential to start the reaction, but its decomposition is not the rate determining step. Up to 20% of KClO4 leads to enhanced burning rate, while excess had the opposite effect. Mo in excess of stoichiometry increases the reaction rate which seems to depend on thermal conductivity rather than on the heat of reaction. DTA of the tricomponent system shows two exotherms. The first one is due to the reaction between Mo and KClO4 releasing enough heat to start the second reaction between Mo and BaCrO4. Then the products of these reactions viz. BaO and MoO3 combine to give BaMoO4. X-ray diffraction data confirmed the products as BaMoO4, Cr2O4 and KCl, with excess Mo remaining unreacted.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prep.19890140306
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