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Science and Technology of Energetic Materials

Vol.64, No.2 (2003)

Research paper

Thermal behavior of various metal complex nitrates (V)- Co complex nitrates -
Miyako Akiyoshi, Nao Yamaguchiya, and Hidetsugu Nakamura
p.61-67

Abstract

The thermal behavior of Co complex nitrates of carbohydrazide and ammine (hereafter, CoCDH and CoAM, respectively) was investigated when mixed with two kinds of the oxidizing agent, strontium nitrate (hereafter, SrN) and copper nitrate basic (hereafter, CNB).
The thermal stability of CoCDH was slightly lower than that of CoAM, while its thermal reactivity was higher, as demonstrated by the results of differential thermal analysis. Both complexes reacted more strongly to CNB in comparison with SrN.
Neither ignition nor burning occurred in the CoAM - SrN mixture during the combustion experiment. The CoCDH - CNB mixture was the most easily ignited of all the mixtures. The positive energy necessary for igniting the mixtures except for the CoCDH - CNB was thought to be offset by melting and endothermic reaction.
In regard to combustion reactivity, the CoCDH - CNB mixture was thought to be the most effective as a gas generant because of its small pressure exponent and low burning temperature. The CoAM complex did not easily react with the two kinds of oxidizing agent used in this experiment, necessitating the addition of another component in order to improve the reactivity.
In the CoCDH complex mixtures, the use of CNB as an oxidizing agent considerably reduced the generation of the NOx gas, while the generation of CO gas increased due to the temperature reduction. For the CoAM mixture, a relatively high amount of NOx gases were generated, because the combustion temperature was high. On the other hand, CO gas was not generated.

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