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A Study of molybdenum/barium chromate/potassium perchlorate delay system (1)
Author(s) -
Rajendran A. G.,
Ramachandran C.,
Babu V. V.
Publication year - 1989
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.19890140306
Subject(s) - potassium perchlorate , chemistry , differential thermal analysis , inorganic chemistry , stoichiometry , thermal decomposition , molybdenum , reaction rate , perchlorate , diffraction , organic chemistry , ion , physics , optics , catalysis
The effect of percentage variation of Mo and KClO 4 on Mo‐BaCrO 4 ‐KClO 4 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. KClO 4 is found to be essential to start the reaction, but its decomposition is not the rate determining step. Up to 20% of KClO 4 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 KClO 4 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 BaMoO 4 . X‐ray diffraction data confirmed the products as BaMoO 4 , Cr2O 4 and KCl, with excess Mo remaining unreacted.