A study on combustion behavior of magnesiumsodium nitrate binary mixtures

Singh, H. N.; Somayajulu, M. R.; Rao, R. Bhaskara

doi:10.1016/0010-2180(89)90077-1

Cited by 18 publications

(3 citation statements)

References 3 publications

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“…A strong endothermic peak at 306 ~ along with a weak endothermic peak at 272 ~ are observed in the four curves. The strong endothermic peak can be assigned to the melting of NaNO3 [14]. The weak peak at 272 ~ could be due to any impurity or any transition for NaNO3.…”

Section: Dscmentioning

confidence: 98%

A study on combustion behaviour of carbon-sulphur-sodium nitrate mixtures

Hussain

Rees

1991

Journal of Thermal Analysis

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The effect of substitution of KNO3 by NaNO3 in black powder has been studied by DSC, TG/DTG and FFIR emission spectroscopy. Unlike KNO3, there is no visible exothermic reaction between S and NaNO3, immediately after the melting of NaNO3. Instead a minor exothermic reaction is observed at higher temperature between melted NaNO3 and adsorbed S on carbon. However, there is an increase in such reaction, when carbon black instead of charcoal is used. Infrared spectra show that CO2 and Na2SO4 are major gaseous and solid products respectively. This shows that the combustion of ternary mixtures in air is different from that in N2, with slower heating rate, in DSC or TG apparatus.The combustion of black powder [1-3] which has a traditional composition of KNO3 (75%), charcoal (15%) and S (10%) [4][5] has been studied in our laboratories. Although black powder is the oldest explosive known, it is still being used due to its peculiar properties [6]. Extensive studies [7][8][9] have been carried out and a substitute has been sought [10].Sodium nitrate is used as an oxidizer in propellants for air-augmented rocket applications [11][12] and trip flare or ignition mixtures [13].In our study the KNO3 has been substituted by NaNO3 and the combustion behaviour of mixtures containing NaNO3, carbon black/charcoal and S has been studied by DSC, TG/DTG and FTIR emission spectroscopy. ExperimentalThe sieved powdered samples of (<125/zm) NaNO3 (Aldrich Chemical

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Section: Dscmentioning

confidence: 98%

A study on combustion behaviour of carbon-sulphur-sodium nitrate mixtures

Hussain

Rees

1991

Journal of Thermal Analysis

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“…Some dielectric heating of the condensed phase does occur, however, as demonstrated by microwave-based auto-ignition of pyrotechnic articles which can be achieved after ~40 s of microwave illumination. Assuming pyrotechnic article microwave heating is spatially uniform and assuming autoignition occurs between 467 °C and 565 °C [40] , and neglecting convective losses, we estimate the average microwave absorption of condensed phase reactants is 6.0 W to 7.3 W. Much of the condensed phase reactant heating is expected to be a result of microwave loss in the metal nitrate. Studies on microwave sintering of Mg particles have found Mg heating to be slow (17.1 K/min, 1.0 kW multimodal cavity) [41] .…”

Section: Vis/nir Spectral Emission Enhancementmentioning

confidence: 99%

Microwave-assisted modulation of light emission intensity in alkali-pyrotechnic plumes

Barkley

Lynch

Miklaszewski

et al. 2021

Combustion and Flame

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“…For this reason, it has been used as a fuel component in solid propellants, pyrolants, and pyrotechnics. Singh et al [1] and Singh and Rao [2] have described solid propellant grains that are superstoichiometrically loaded with magnesium for ramjet propulsion applications. Shafirovich et al [3] and Miller and White [4] have described the use of magnesium powders for extraterrestrial and underwater thruster applications.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet Radiation from Combustion of a Dense Magnesium Powder Flow in Air

Baker

Miller

2013

Journal of Thermophysics and Heat Transfer

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Combustion of magnesium produces copious ultraviolet and visible light emissions. The ultraviolet emission can be employed potentially in an antibacterial capacity. Ultraviolet radiation from the combustion of a heavily laden flow of magnesium powder with air was measured in a linear test combustor fitted with optical access ports. Silicon photodiode detectors sensitive to ultraviolet emissions were used to determine this broadband flux. A calibration lamp with known values of spectral irradiance was used to validate the ultraviolet flux measurement method, and a mockup of the optical access port assembly was used to ensure accounting for the proper view factor. The broadband ultraviolet flux measurements were compared for several different air/fuel ratios, ranging from 2 to 7, and different magnesium flow rates. Very fine magnesium oxide particle buildup on the quartz windows limited the length of time during the test runs when measurements could be made.

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A study on combustion behavior of magnesiumsodium nitrate binary mixtures

Cited by 18 publications

References 3 publications

A study on combustion behaviour of carbon-sulphur-sodium nitrate mixtures

A study on combustion behaviour of carbon-sulphur-sodium nitrate mixtures

Microwave-assisted modulation of light emission intensity in alkali-pyrotechnic plumes

Ultraviolet Radiation from Combustion of a Dense Magnesium Powder Flow in Air

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