Preparation and growth mechanism of micro spherical ammonium dinitramide crystal based on ultrasound-assisted solvent-antisolvent method

• DOI: 10.1016/j.ultsonch.2021.105716
• Publication Date: 2021-08-16T05:47:47Z
• Authors: Jingjing Li; Rongjie Yang; Tao Zeng; Jinghui Hu; Weiqiang Tang; Zhenhui Liu; Li Gong
• Keywords: Supersaturation; Crystal (programming language); Recrystallization (geology); Surface-area-to-volume ratio

Micro-sized spherical ammonium dinitramide (ADN) crystals are successfully prepared by a facile ultrasound-assisted solvent-antisolvent recrystallization method without introducing any additives. The influences of the volume ratio solvent to antisolvent, antisolvent temperature and ultrasound power on micro-morphologies properties ADN studied systematically. changes morphology, particle size, crystal structure melting point characterized through scanning electron microscopy (SEM), laser size analyzer (LPSA), X-ray diffraction (XRD) differential calorimetry (DSC), respectively. results show that optimal experimental parameters for morphology as follows: is 1:50, 20 ℃, 70 W. predicted hexagonal-flake morphologies close morphologies. growth mechanism with supersaturation solution. As degree increases, models change from spiral rough growth, large-sized ball small-sized ball.