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Ammonium perchlorate

About: Ammonium perchlorate is a research topic. Over the lifetime, 2359 publications have been published within this topic receiving 33412 citations. The topic is also known as: AP.


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Journal ArticleDOI
Yu Chen1, Yunfei Liu1, Liang Shi1, Wei Yang1, Weishang Yao1 
TL;DR: In this paper, an effective pathway was explored to design and select proper bonding agents that could effectively improve the interfacial interactions between bonding agents and solid particles, with three novel synthesized alkyl bonding agents, dodecylamine-N, N-di-2-hydroxypropyl-acetate (DIHPA), dodecyl-polycyclic pyroxene (DIHPHA), as examples.
Abstract: An effective pathway was explored to design and select proper bonding agents that could effectively improve the interfacial interactions between bonding agents and solid particles, with three novel synthesized alkyl bonding agents, dodecylamine-N,N-di-2-hydroxypropyl-acetate (DIHPA), dodecylamine-N,N-di-2-hydroxypropyl-hydroxy-acetate (DIHPHA) and dodecylamine-N,N-di-2-hydroxypropyl-cyano-acetate (DIHPCA), as examples. Molecular dynamics simulation was applied to compare unit bond energies of these bonding agents with the [110] crystal face of ammonium perchlorate (AP) and the [120] crystal face of hexogen (RDX). The infrared test was used to characterize the interfacial interactions of these bonding agents with AP or RDX. XPS test was applied to calculate the adhesion percentage of the bonding agents on the surface of precoated AP or RDX particles. All of the above results indicated that these three bonding agents have strong interfacial interactions with AP or RDX in the order of DIHPCA>DIHPHA>DIHPA. The prepared three bonding agents were used in HTPB/AP/RDX/Al propellants, and their effects on tensile strength (σ), elongation under maximum tensile strength (em), elongation at breaking point of the propellant (eb) and adhesion index (Φ) of the propellant were studied. The results show that the bonding agents improve the mechanical properties of the propellant in the order of DIHPCA>DIHPHA>DIHPA. The methods found from theoretical design, materials synthesis, and mechanistics studies up to practical application show effective guiding significance for choosing the proper bonding agent and improving the interfacial interactions between the solid particles and binder matrix.

26 citations

Journal ArticleDOI
TL;DR: In this paper, a self-generated template path was introduced to ensure homogeneous distribution of metal cations at atomic level and serve as the carbon source of the selfgenerated carbon template, resulting in porous MgAl2O4 with a specific surface area as high as 291 m2 g−1.
Abstract: Developing low-density additives with high activities is significantly important for thermal decomposition of ammonium perchlorate and the relative technical applications. In this paper, nanoparticles of magnesium aluminate (MgAl2O4) with a low density of 3.02–3.17 g cm−3 were synthesized by a self-generated template path, in which citric acid was introduced to ensure homogeneous distribution of metal cations at atomic level and serve as the carbon source of the self-generated carbon template. Carbon template was generated by pyrolysis and carbonization of citrate after calcinations at 800 °C in N2, and then removed with annealing in air at high temperatures, resulting in porous MgAl2O4 with a specific surface area as high as 291 m2 g−1. Depending on the annealing temperatures, the primary sizes of MgAl2O4 nanoparticles that built up the porous structures were adjusted from 6.2 to 24.7 nm. The structural characteristics of MgAl2O4 nanoparticles were systematically studied by X-ray diffraction, transmission electron microscopy, Braun-Emmet-Teller analysis, and the catalytic role were evaluated by thermal decomposition of ammonium perchlorate. All samples were indicated to be X-ray-pure MgAl2O4, among which MgAl2O4 nanoparticles with a largest surface area of 291 m2 g−1 and pore volume of 0.24 cm3 g−1 was proved to have an optimum catalytic activity: exothermic peaks of AP thermal decomposition shifted towards the lower temperatures by 78.3 °C for high-temperature decomposition process. The relative kinetic process was also investigated.

26 citations

Journal ArticleDOI
TL;DR: In this article, the effect of small additive (1.25-5.00%) of ultrafine aluminum powders (UFAP) on the rheology and combustion of model four-component energetic condensed systems is studied.
Abstract: The effect of small additives (1.25–5.00%) of ultrafine aluminum powders (UFAP) on the rheology and combustion of model four-component energetic condensed systems is studied. It is found that the addition of UFAP decreases the temperature of HMX decomposition. Small additives of UFAP increase the burning rate of model energetic condensed systems and decrease the exponent ν in the burning rate law without deteriorating the rheological characteristics of the model propellants.

26 citations

Journal ArticleDOI
TL;DR: In this paper, the rate constants for ammonium perchloric acid perchlorate reaction were estimated based on experimental data on the chemical structure of a flame in O2/NH3/Ar, NH3/HClO4/H2O/Ar mixtures.
Abstract: We continue the study begun in [1, 2] of chemical processes in perchloric acid—ammonia flames. We propose new channels for the reaction. Based on experimental data on the chemical structure of an ammonium perchlorate flame and flames in O2/NH3/Ar, NH3/HClO4/H2O/Ar mixtures, we estimate the rate constants for steps that have not been well studied and refine the kinetic mechanism of [1, 2]. We discuss calculation results for the chemical structure of a flame in an NH3/HClO4/H2O/Ar mixture and an ammonium perchlorate flame. We simplify the kinetic mechanism.

26 citations

Journal ArticleDOI
TL;DR: In this article, the reaction mechanisms of hydroborate iron compound (HIC), a promising candidate for combustion catalyst, in AP/HTPB/Al composite solid propellants using ammonium perchlorate (AP) as the oxidizer and aluminum as the metal fuel.

26 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023106
2022209
2021100
2020113
2019100
201884