Burn rate (chemistry)

About: Burn rate (chemistry) is a research topic. Over the lifetime, 847 publications have been published within this topic receiving 8908 citations. The topic is also known as: Burning rate.

Low pressure ballistic system

Abstract: A system for launching a relatively low velocity projectile, which system generates a low pressure propelling gas supply. The propelling gas supply is generated by burning a propellant comprising a small percentage of a primary explosive intimately mixed with a finely divided fuel-oxidizer mixture. The burning rate of the propellant is slower than the detonation rate of the primary explosive, and the propellant sustains burning and generates gas at a rate which is independent of temperature and pressure.

Synthesis and Energetic Properties of 4,4′,5,5′‐Tetranitro‐2,2′‐biimidazolate(N4BIM) Salts

Abstract: This paper describes the synthesis and characterization of several salts of 4,4′,5,5′-tetranitro-2,2′-biimidazolate (N4BIM). Each of the salts were characterized chemically, thermally, morphologically, as well as with respect to destructive stimuli (impact, electrostatic discharge, friction, thermal). These salts show promise as propellant ingredient additives, and in particular, the bis-triaminoguanidinium salt of N4BIM displays excellent burn rate and combustion behavior. Our combustion studies have shown that TAGN4BIM displays a fast burning rate and has the lowest pressure dependence exponent yet measured for a triaminoguanidinium salt.

High energy propellant with reduced pollution

Abstract: This invention relates to energetic compositions, which offer increased performance in conjunction with a total absence of hydrogen chloride in the combustion products. The formulation avoid the use of halogen based oxidizers to prevent the formation of halogen based byproducts. The formulations disclosed herein use ammonium dinitramide as a primary oxidizer, which is a more energetic molecule than ammonium perchlorate. The solid propellant formulations disclosed herein comprise about 5.0 to about 10.0 weight % of at least one energetic binder; about 20.0 to about 35.0 weight % of an energetic plasticizer; about 25.0 to about 45.0 weight % of ammonium dinitramide as a primary oxidizer; about 0.0 to about 20.0 weight % of particulate aluminum having a particle size of about 1 μm to about 60 μm; and about 0.0 to about 20.0 weight % of ultrafine aluminum having a particle size of less than 1 μm. In addition to the ingredients in this basic formulation will be cure catalysts, curatives, crosslinkers, burn rate catalysts and modifiers, thermal and aging stabilizers other such ingredients commonly utilized in solid propellant formulations.

Low temperature gas generating compositions and methods

Abstract: A pyrotechnic powder composition comprising a mixture of an oxidizer powder and an oxygen bearing metal organic compound powder is used for inflating a passenger restraint bag for an automobile. Metals preferred for the metal organic compound have a free energy of oxidation less than the free energy of oxidation of carbon monoxide. An exemplary composition comprises a mixture of anhydrous nickel formate and potassium chlorate. When these react, substantial volumes of oxygen, carbon dioxide and water vapor are released for inflating a passenger restraint bag. The burning rate of the powder composition may be increased by including up to about 20 percent of an enhancer distributed in the powder and having a burn rate substantially higher than the burn rate of the powder composition.