The sphericity and size of ammonium perchlorate (AP) particles significantly influence the properties of composite propellants. As the AP particles become more spherical, the accumulation coefficient increases, the viscosity during casting decreases, and the particle loading and burning rate increase. Hence, the production of micronized AP particles with an average size between 1 and 20 μm is important to increase the loading percentage of AP in the composite propellant. Here, the Taguchi experimental design was used to optimize the solvent‐antisolvent crystallization (SAC) process for the preparation of micronized AP particles with higher sphericity. SAC parameters such as the type of antisolvent, the solvent‐to‐antisolvent ratio, the antisolvent temperature, the stirring speed, and the retention time were investigated at four levels. The type of antisolvent and the solvent‐to‐antisolvent ratio were found to mainly contribute to improving the sphericity and size of the AP particles, respectively.

中文翻译：

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田口优化溶剂-反溶剂结晶法制备高氯酸铵颗粒

高氯酸铵（AP）颗粒的球形度和大小会显着影响复合推进剂的性能。随着AP颗粒变得更球形，聚集系数增加，浇铸过程中的粘度降低，颗粒负载和燃烧速率增加。因此，平均粒径在1至20μm之间的微粉化AP颗粒的生产对于增加AP在复合推进剂中的负载百分比非常重要。在这里，Taguchi实验设计用于优化溶剂-反溶剂结晶（SAC）工艺，以制备具有更高球形度的微粉化AP颗粒。在四个级别上研究了SAC参数，例如抗溶剂的类型，溶剂与抗溶剂的比例，抗溶剂温度，搅拌速度和保留时间。