S. P. Sivapirakasam, M. Surianarayanan* and R. Vijayaraghavan Abstract: A pyrotechnic flash composition consisting of 53% KNO3, 30% Al and 17% S is subjected to Accelerating Rate Calorimetry (ARC) studies. The onset point for thermal explosion is 191 ºC resulting in the generation of a considerable quantity of gaseous products. The mixture is vulnerable to …
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Interrelation between Impact, Friction and Thermal Energy of Pyrotechnic Cracking Reaction
S. P. Sivapirakasam and M. Surianarayanan* Abstract: Firework chemical mixtures are sensitive to thermal and mechanical stimuli and lead to many explosive incidents. Experimentally determined thermal and mechanical (impact and friction) sensitivity data of a flash composition mixture are subjected to statistical and graphical analysis in order to understand the mechanism of triggering accidents. The …
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Effect of Particle Size on the Mechanical Sensitivity and Thermal Stability aspects of Pyrotechnic Flash Compositions
S. P. Sivapirakasam, M. Surianarayanan,* F. Chandrasekaran and G. Swaminathan Abstract: The mechanical and thermal sensitivity of pyrotechnic flash compositions consisting of mixtures of potassium nitrate (KNO3), sulphur (S) and aluminum (Al) with varying particle sizes of KNO3 and Al indicated that, irrespective of the composition of the cracker mixture, all the compositions were found …
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JPyro – Issue 23, Summer 2006 – Contents
Full Papers: Computer Modelling of Flying Star Ballistics Temperature Measurements within the Luminous Region of a Burning Ba(NO3)2/Al Mixture Ballistics of an Iron Bar Shot from a Mortar Ballistics of a No. 3 Spherical Shell with Illuminant Effect of Particle Size on the Mechanical Sensitivity and Thermal Stability aspects of Pyrotechnic Flash Compositions Interrelation between …
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JPyro – Issue 22, Winter 2005 – Contents
Full Papers: Interior Pressure in the Mortar and Motion of a No. 3 Shell in a Fireworks Shot A Prediction of Aerial Shell and Comet Trajectories Using SHELLCALC© Reaction propagation between fireworks shells and compositions confined in steel pipes Thermodynamic and Spectroscopic Analysis of a Simple Lilac Flame Composition A Thrust and Impulse Study of …
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JPyro – Issue 21, Summer 2005 – Contents
Full Papers: A Review of the Chemistry and Dynamics of Pyrotechnic Whistles Air Blast TNT Equivalency for Rolls of Paper Toy Caps Optical Studies of Combustion Chamber Flame in a Hybrid Rocket Motor Choked Flow, a Frequently Misunderstood Term Special Materials in Pyrotechnics: IV. The Chemistry of Phosphorus and its Compounds Impact Sensitiveness Analysis of …
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JPyro – Issue 20, Winter 2004 – Contents
Full Papers: Simple Core Design for Neutral Burn Composite Rocket Motors Strobe Chemistry Maximizing the Number of Electric Matches That Can Be Fired in a Single Circuit Sparking Compositions for Garden Fireworks Principles of Solid Rocket Motor Design A Practical Performance Testing Protocol for Fireworks Mortar Tubes Fireworks Shells Subjected To a Modified Height-To-Detonation Test …
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JPyro – Issue 19, Summer 2004 – Contents
Full Papers: Metal Monochloride Emitters in Pyrotechnic Flames – Ions or Neutrals? Experimenting with High Explosive Fuel Explosions for Movies and Television Industrial Scale Nano-Aluminum Powder Manufacturing Essential Molecular Orbital Theory for the Study of Pyrotechnics Guanidinium Azo-Tetrazolate (GAT) as a High Performance Hybrid Rocket Fuel Additive A Report on the Fireworks Accident at Carmel, …
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JPyro – Issue 18, Winter 2003 – Contents
Full Papers: Color Values and Spectra of the Principal Emitters in Colored Flames Thermal Characterization of Smoke Composition Control Systems for the Storage of Explosives, Including Fireworks Studies of the Thermal Stability and Sensitiveness of Sulfur/Chlorate Mixtures — Part 5: Application of Self-Heating Theory to the Prediction of Ignition Temperatures Assessing the Risks — Suggestions …
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JPyro – Issue 17, Summer 2003 – Contents
Fill Papers: Color Purity Measurements of Traditional Pyrotechnic Star Formulas A Study of the Combustion Behaviour of Pyrotechnic Whistle Devices (Acoustic and Chemical) Reasons for Fuse Failure and Drift Distance of Spherical Fireworks Shells Some Properties of Explosion Generated Toroids Feasibility Study on the Use of Nanoscale Thermites for Lead-Free Electric Matches Communications: A Curious …
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