Fukuoka University
Fukuoka University
Fukuoka University
Fukuoka University
Fukuoka University
Department of Space Flight Systems, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
In this study, we prepared ammonium nitrate (AN)/ ammonium perchlorate (AP) mixed particle using spray drying for the fundamental study on AN/AP-based propellants. We investigated their surface properties and thermal behavior by scanning electron microscopy (SEM) and thermogravimetry/differential thermal analysis (TG/DTA) respectively. In the result of SEM analysis, the shape of the AN/AP particles was almost spherical. In some cases, particle partially aggregated because of moisture absorption by AN. The average particle diameter was approximately 36-38 μm. In the result of TG/DTA, endothermic peaks were observed around 130-230 and 280-375 C and exothermic peak was observed around 230-280 C. From the comparison with the result of AN and AP, it is considered that endothermic peaks were caused by each thermal decomposition. On the other hand, we suggest that the exothermic peak may result from the reaction between AP and AN because it is only observed in the curves of AN/AP. Endothermic peaks derived from crystal structure transformation of AN were observed around 43, 90 and 125 C by thermal analysis of AN and AN/AP. The peak around 90 C of AN/AP was extremely smaller than that of AN, and this suggested that crystal structure of AN might be changed. Keywords: AN, AP, Spray drying, DSC, TG-DTA.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
スプレードライ法により調製したAN/AP粒子の表面状態および熱的挙動の観察
AA1530013003.pdf
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