Preparation of Ultrafine Lead Ferrocyanide/ammonium Perchlorate Composite Particles and Study of Their Thermal Decompositionand Anti-agglomeration Performance

doi:10.3969/j.issn.1000-1093.2019.11.006

Abstract

Abstract: In order to improve the decomposition performance and dispersibility of ammonium perchlorate (AP), the crude lead ferrocyanide (Pb₂Fe(CN)₆) was synthesized by using the coordination precipitation method, and the nanometer-scale particles were pulverized by using a vertical stirring ball mill. Ultrafine Pb₂Fe(CN)₆/AP composite particles were prepared by using direct grinding method, ultrasonic assisted method and solvent-nonsolvent method. The morphology, particle size, crystal structure and thermal decomposition performance of the prepared composite particles are characterized by using scanning electron microscope, dry laser granulometer, X-ray diffractometer, infrared spectrometer and differential scanning calorimetry. The morphology of composite particles synthesized by solvent-nonsolvent method is quasi-spherical, the particle size is about 8 μm, the dispersion is relatively uniform, and the coating effect is better. Compared with pure AP, the pyrolysis temperatures of the composite particles prepared by direct grinding method, the ultrasonic assisted method and the solvent non-solvent method are reduced from 446.3 ℃ to 390.4 ℃,391.2 ℃and 379.1 ℃, respectively. The activation energy of pyrolysis is reduced by 14.2%, and the rate constant k is increased by 28.6 times. The combination of AP and Pb₂Fe(CN)₆ can effectively prevent AP agglomeration, meanwhile, the apparent bulk density is increased by 6.16%，and the tap density is increased by 10.4%. Key

Key words: leadferrocyanide, ammoniumperchlorate, compositeparticle, thermaldecomposition, anti-agglomeration

CLC Number:

ZHANG Zhengjin, GUO Xiaode, LIU Jie, LIANG Li, LI Kuankuan, CHANG Zhipeng, XIA Liang, TIAN Shubao, HUANG Dongyan, YANG Xueqin. Preparation of Ultrafine Lead Ferrocyanide/ammonium Perchlorate Composite Particles and Study of Their Thermal Decompositionand Anti-agglomeration Performance[J]. Acta Armamentarii, 2019, 40(11): 2220-2228.

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第40卷
第11期2019 年11月兵工学报ACTA
ARMAMENTARIIVol.40No.11Nov.2019

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