The authors have previously reported that 5-amino-1H-tetrazole (5-ATZ) / lithium perchlorate LiClO4 mixture has displayed high linear burning rates and generated large amount of gas per unit mass. It has also been clarified that adding small amount of copper(II) oxide CuO to the mixture has enhanced the linear burning rates even though the adiabatic flame temperatures have decreased. In this study, factors leading to the enhancement of linear burning rates were examined through thermal analyses of the mixtures. According to the thermal analyses, decomposition of 5-ATZ was found to initiate prior to the decomposition of LiClO4, and the addition of CuO has caused a drastic decrease in the initiation temperature for exothermic reaction of 5-ATZ / LiClO4 mixture. Therefore, through addition of a small portion of CuO, exothermic reactions between 5-ATZ and CuO may have initiated at a relatively low temperature, and then from this exothermic reaction, the reactions of 5-ATZ / LiClO4 mixtures may have initiated at a lower temperature, leading to an increase in the linear burning rate. Furthermore, an increase in the heat of exothermic decomposition through CuO addition may have contributed to an increase in the linear burning rate.
前報で5-amino-1H-tetrazole（5-ATZ）と過塩素酸リチウム混合物は線燃焼速度が速く，単位質量当たりのガス発生量が多いことを報告した。この混合物に酸化銅（II）を少量加えると，断熱火炎温度は，減少するにもかかわらず線燃焼速度が増加することを報告した。本報では熱分析により，線燃焼速度が増した原因を検討した。5-ATZは，過塩素酸リチウムより低温で分解し，酸化銅（II）を添加すると混合物の発熱反応の開始温度が著しく低下することがわかった。5-ATZと酸化銅（II）の発熱反応が低温で開始するため，5-ATZと過塩素酸リチウムの反応開始温度は低下し，線燃焼速度の増加となったものであろう。酸化銅（II）の添加により分解熱量が増加することも線燃焼速度の増加に寄与していると考えられる。
5-Amino-1H-tetrazole, Lithium perchlorate, Copper(II) oxide, TG-DTA analyses, Mass spectrometry.