Science and Technology of Energetic Materials

Vol.69, No.4 (2008)

Research paper

Burning characteristics of aminoguanidinium 5,5'-azobis-1H-tetrazolate / ammonium nitrate as gas generating mixtures
Yasuyoshi Miyata, Masahiro Abe, Shingo Date, Makoto Kohga, and Kazuo Hasue


Ammonium nitrate (AN) has been attracting attention as an oxidizer of gas generating mixtures. However, the gas generating mixtures that contain AN have the disadvantages that they are difficult to ignite, and that the burning rate is generally slow. In this study, aminoguanidinium 5,5'-azobis-1H-tetrazolate (AGAT), a tetrazole that could cause exothermic decomposition was used as a fuel, mixed with AN. To begin with, the initial decomposition of AGAT was examined by means of TG-DTA-MS. It was found that AGAT melted at 482 K, followed immediately by a dramatic decomposition, leading to 50 % weight loss. The decomposition of AGAT started from the cleavage of the heterocyclic ring which produced nitrogen and cyanamide with generation of heat. The burning rate of AGAT and AN mixture was also examined. Copper(II) oxide CuO or manganese dioxide MnO2 that has been widely known as the decomposition catalyst of AN was added to the mixture to enhance the mass burning rate. The addition of CuO to the mixture enhanced the mass burning rate and decreased the pressure exponent of Vieille's equation, but the addition of MnO2 did not enhance the mass burning rate. By means of thermocouples, the temperature profiles of the burning mixtures were also obtained and it was suggested that CuO may activate the reaction in the condensed phase reaction zone.

> Full text (Open access*)


Ammonium nitrate, Aminoguanidinium 5,5'-azobis-1H-tetrazolate, Copper (II) oxide, Temperature profile, Condensed phase.  

© Copyright 1999-2017 Japan Explosives Society. All right reserved.