Yi Wang, Xiaolan Song, Chongwei An and Fengsheng Li Abstract: Three very inexpensive and readily available colour composites (red, green, and blue) with different binders were prepared by a mechanical milling method. Their micron morphology, thermal reactions, and safety characteristics were evaluated. In particular, as a focus of this work, their combustion performances were investigated …
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Category:JPyro – Articles
The main category – things that are published in the Journal
A New Model for Pyrotechnic Strobes
Richard Harrison Abstract: Existing models that purport to describe the mechanisms that occur in an ignited pyrotechnic strobe composition can all be shown to fail, in one respect or another, to match the observed behavior. By including separate reaction mechanisms for the smolder and flash phases, the proposed new model can avoid all such failings. …
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A Study of Ambient Air Quality Impact of Fireworks and Pyrotechnics in 2023-2024 in Hong Kong
Chee Hang Chan, Wing Cheong Lo Abstract: As the Hong Kong government announced monthly fireworks and pyrotechnics displays to promote the city as a tourist destination in February 2024, some environmental groups raised concerns about the air pollution impact from fireworks and pyrotechnics in the Victoria Harbour, claiming that the monthly fireworks will generate air …
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A Study of a Set of Pyrotechnic Strobe Compositions Based on Ammonium Perchlorate
Richard Harrison Abstract: The subject of this study is a set pyrotechnic strobe compositions, containing ammonium perchlorate, a magnesium-aluminum alloy, barium sulfate and potassium dichromate, together with a small amount of nitrocellulose to act as a binder. Despite the fact that compositions of this type have been previously studied in some detail, there is still …
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Thermal properties of the barium nitrate – metallic fuel (aluminum, magnesium and magnalium) systems
Yuriy Verbovytskyy Abstract: This study utilized X-ray diffraction to characterize the phase composition of the product obtained by the oxidation and combustion of aluminum, magnesium, and magnalium powders, as well as their stoichiometric mixtures with barium nitrate. Magnesium is a highly reactive metal, readily burning and oxidizing both as a pure powder and when mixed …
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A Study of a Set of Nitrate-Based Pyrotechnic Strobe Compositions
Richard Harrison Abstract: The subject of this study is a set of simple pyrotechnic strobe compositions, containing only barium nitrate, a magnesium-aluminum alloy and sulfur, together with a small amount of nitrocellulose to act as a binder. Despite the fact that compositions of this type have been known for well over one hundred years, thare …
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Polysulfide sparklers revisited: a practical introduction to Carbo Hanabi
Frederick Van Der Sypt, M.D Abstract: Polysulfide sparklers in the form of Senko Hanabi have been enjoyed for centuries. Research has shown that potassium nitrate can be replaced with non-oxidizing salts providing equally performing compositions that are non-explosive. This article aims to translate this research into practice and presents a detailed construction method for Carbo …
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A New Aerial Shell Ballistic Model Experimentally Verified
L. Weinman, K. L. & B.J. Kosanke and J Widmann Abstract: The authors present models that predict fireworks shell trajectories and validate them with experimental data. Ref: JPyro 2022 (A)
Some Factors Affecting the Performance of a Class of Ammonium Perchlorate-Based Pyrotechnic Strobe Compositions
Richard Harrison Abstract: Despite well over a century of research, which has seen the development of many effective pyrotechnic strobe compositions, there is as yet very little understanding of the strobe mechanism. In the past, theoretical models have been developed, but are here shown to be unable to explain many of the observed characteristics. Factors …
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Development and Qualification Testing of Pyro-cartridge for Signal Cartridge Applications
Bhupesh A. Parate Abstract: This research work describes the development and qualification aspects of a pyro-cartridge device for signalling cartridge applications in an emergency, as required by military aircraft. Rapid and effective burning of illuminating composition plays a crucial role in military applications. For initiation of illuminating cartridge, a pyro-cartridge is used. A pyro-cartridge consists …
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