Thermal behavior of Al/Zr/KClO4 pyrotechnic compositions at high temperature

Ji, Xiangbo; Liu, Yonggang; Li, Zhenfeng; Yu, Qian; Gao, Yuan; Zhang, Haibin; Wang, Liang

doi:10.1016/j.tca.2017.11.006

Cited by 19 publications

(3 citation statements)

References 21 publications

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“…References [21,22] pointed out that solid–solid reaction between KClO 4 and Zr occurred before the solid–gas reaction between Zr and the released gas oxygen, since the exothermic temperature of KClO 4 /Zr mixture was lower than the thermal decomposition temperature of KClO 4 . SEM images in Reference [25] also showed that the solid–solid reaction between KClO 4 and Zr occurred at low temperatures of 300~500 °C, but TG curves showed obvious weight loss when the temperature was above 400 °C, indicating that with the increase of temperature, the reaction between solid Zr and gas oxygen became dominant.…”

Section: Resultsmentioning

confidence: 99%

Facile Preparation of Micrometer KClO4/Zr Energetic Composite Particles with Enhanced Light Radiation

Kang

Zhou

et al. 2019

Materials

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Developing energetic composite materials consisting of fuel and oxidizer is an effective strategy to enhance the energy release property. However, this strategy has rarely been applied in Potassium Perchlorate (KClO4)-containing energetic materials, even though KClO4 is a much stronger oxidizer than most previously reported metal-oxide oxidizer. One of the main obstacles is the lack of simple and in situ ways to introduce KClO4 into the composite. In present work, micrometer KClO4/Zirconium (KClO4/Zr) composite particles were successfully prepared using a facile chemical solution-deposition method. The structure and particle morphologies of as-obtained KClO4/Zr composite were characterized by X-ray diffraction (XRD) and scanning electronic microscope (SEM)-EDS (Energy Dispersive Spectrometer). The evolutionary combustion behavior was evaluated using flame-based light-radiation spectra and successive photography technique. Results showed that the morphology, light-radiation properties and flame-evolution characteristics of KClO4/Zr composite varied with the content of KClO4 and the particle size of Zr. Compared with the mechanical mixture of KClO4/Zr, the KClO4/Zr composite showed much higher light-radiation intensity and longer light-emission duration time after reasonably controlling the preparation parameters. Flame photographs revealed that the enhanced light radiation of KClO4/Zr composite should be ascribed to higher use efficiency of “oxygen” in the oxidizer, which promoted both the solid–solid and solid–gas reaction pathways between KClO4 and Zr.

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Section: Resultsmentioning

confidence: 99%

Facile Preparation of Micrometer KClO4/Zr Energetic Composite Particles with Enhanced Light Radiation

Kang

Zhou

et al. 2019

Materials

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“…While bursting firecrackers, it is obvious that the process releases too much amount of gaseous and particulate type of pollutants in large amounts. To eliminate the gaseous types of pollutants like CO 2 , SO x , NO x , etc., researchers carried out their research on various types of alternatives (Ji et al, 2018;Yao et al, 2012). However, the particulates released during firecrackers display is not properly collected and analyzed.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Fireworks Residue Obtained From the Flash Powder Containing Aluminium and Boron

AZHAGURAJAN¹,

MARICHELVAM²,

PRAKASH³

2023

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Herein, we report the characteristics of residues obtained after igniting the flash powder mixture consisting of varying amounts of Aluminium (Al) and Boron (B) with other energetic materials like potassium nitrate (KNO3 ) and sulphur (S). The nature of particulate matter collected after combustion was characterized through FESEM-EDX, FTIR, STA (TGA/DSC) and ICP spectrometer. FTIR spectra analysis reveals about the presence of various metal oxides, K2 S and K2 SO4 . On replacing aluminum by boron, more alkaline K2 S present in the residue was converted into the neutral K2 SO4 . FESEM with EDX confirm the presence of the elements like Al, B, K, S, O, etc., and the size of the particles formed after combustion is about 400 nm. The gradual replacement of aluminum by boron is substantiated from the analysis of residue through ICP Spectrometer. Boron blended fireworks mixture on ignition produces excellent performances and the residues generated do not have any hazardous nature.

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“…KP, often widely used as an oxidizer in propellants and pyrotechnic agents, − has a higher density, higher oxygen balance, lower hygroscopicity, and lower sensitivity compared to AP, in addition to its relatively high burning rate, higher flame temperature, and higher effective propulsion. Pure KP has stable thermal behavior.…”

Section: Introductionmentioning

confidence: 99%

Properties of Mixed Crystal Coprecipitation Substances of Ammonium Nitrate and Potassium Perchlorate Prepared by the Evaporative Solvent Method

Zi,

Han,

et al. 2023

ACS Omega

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Ammonium perchlorate (AP) has been widely used as an oxidizer in propellants and military mixed explosives in recent years. However, its high characteristic signal, environmental pollution, and poor detonation performance have prompted the industry to seek alternatives to AP. Ammonium nitrate (AN) is a suitable substitute due to its low characteristic signal, lack of pollution, and excellent detonation performance. However, its room-temperature phase transition and hygroscopicity affect its practical use. In this work, we prepared mixed crystal coprecipitation (MCC) materials of AN and potassium perchlorate (KP) using the evaporative solvent method. The characterization of AN/KP MCCs was carried out by combining TG-DSC, XRD, FT-IR, and SEM analysis, revealing that the formation of MCCs by AN and KP is due to ion exchange between the two components. AN/KP MCCs not only solve the problem of room-temperature phase transition in AN but also reduce its hygroscopicity. Furthermore, AN/KP MCCs have mechanical sensitivity, explosive performance, and specific impulse similar to pure AN, but compared to AN, AN/KP MCCs have higher density, effective oxygen content, and thermal stability. Compared with existing oxidizers AN, AP, and KP, AN/KP MCCs with high density, low sensitivity, high oxygen content, and high safety have obvious advantages and have good prospects in the application of oxidizers in solid propellants and military mixed explosives.

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Thermal behavior of Al/Zr/KClO4 pyrotechnic compositions at high temperature

Cited by 19 publications

References 21 publications

Facile Preparation of Micrometer KClO4/Zr Energetic Composite Particles with Enhanced Light Radiation

Facile Preparation of Micrometer KClO4/Zr Energetic Composite Particles with Enhanced Light Radiation

Evaluation of Fireworks Residue Obtained From the Flash Powder Containing Aluminium and Boron

Properties of Mixed Crystal Coprecipitation Substances of Ammonium Nitrate and Potassium Perchlorate Prepared by the Evaporative Solvent Method

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