Inflammability of mixtures of metal oxides with aluminum

Chernenko, E. V.; Afanas'eva, L. F.; Lebedeva, Vera; Rozenband, V. I.

doi:10.1007/bf00740402

Cited by 13 publications

(3 citation statements)

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“…Figure 5 presents the TG-DSC curves for the Al/MnO 2 (30/70, w / w ) thermal decomposition. MnO 2 is chemically unstable and can decompose easily [16]. The two degradation stages on the TG curve correspond to the two-step decomposition process of MnO 2 [17,18].…”

Section: Resultsmentioning

confidence: 99%

Thermal Decomposition and Thermal Reaction Process of PTFE/Al/MnO2 Fluorinated Thermite

et al. 2018

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To better understand the thermal decomposition and reaction process of a fluorine-containing powdery thermite, PTFE/Al/MnO2, reactions at different temperatures were investigated by the TG/DSC-MS technique. The corresponding reaction products were characterized with XRD phase analysis. Another three thermite materials, i.e., PTFE/Al, Al/MnO2, and PTFE/MnO2, were also prepared for comparison. Results showed that PTFE behaved as both oxidizer and reducer in PTFE/Al/MnO2 fluorinated thermite. The thermal decomposition and reaction process of as-fabricated ternary thermite could be divided into two stages—the mutual reaction between each of PTFE, Al, and MnO2 and the subsequent reaction produced between Al and Mn2O3/Mn3O4/MnF2. Compared with the three control systems, the specially designed ternary system possessed a shorter reaction time, a faster energy release rate, and a better heat release performance.

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Section: Resultsmentioning

confidence: 99%

Thermal Decomposition and Thermal Reaction Process of PTFE/Al/MnO2 Fluorinated Thermite

et al. 2018

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“…Therefore, the stability of the oxidizer dominates the reaction mechanism of the Al/CuO composite. The oxidizers are generally categorized into different groups based on whether the oxidizers can decompose into oxygen and metal . The thermite reactions are subsequently categorized into gas–solid reactions or condensed phase reactions.…”

Section: Resultsmentioning

confidence: 99%

Diversity in Addressing Reaction Mechanisms of Nano‐Thermite Composites with a Layer by Layer Structure

2017

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The reaction mechanisms and microstructures of various layered nano-thermite composites are investigated through characterization of their energetic properties. Migration of reactive components across the reaction zone is analyzed, which plays an important role in determining the process initiation, reaction propagation, and chemical stability at low temperatures. Distinct types of nanoparticles are deposited onto filter paper in a sequence, using the vacuum filtration method, which promotes intimate contact between neighboring reactive layers. Scanning Electron Microscopy (SEM) images demonstrate a well-defined contact region between the two layers in the Al/CuO or Al/NiO composites. Differential Scanning Calorimetry (DSC) data shows that the thermite reaction occurs below the melting temperature of Al, resulting in rapid heat release, and improves reaction initiation. Elemental mapping results reveal the migration of Al, Ni/Cu, and oxygen before and after the thermite reaction, which is arranged during thermogravimetric analysis (TGA). This analysis indicates the dominant pathway of the thermite reaction in each composite, through either decomposition of the CuO nanoparticles in the Al/CuO composite or through direct migration of reactive components across the conducting surface within the Al/NiO composite.

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“…frontiersin.org reduced. The contact area between aluminum and titanium dioxide in the mixture was much larger than that between aluminum and air (Chernenko et al, 1988;Yang et al, 2003). After reaching the ignition temperature, aluminum reacted with titanium dioxide to release more heat.…”

Section: Frontiers In Energy Researchmentioning

confidence: 96%

Effects of titanium dioxide additions on flash ignition characteristics of aluminum and iron nanoparticles

Liu²,

Liu³

et al. 2023

Front. Energy Res.

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The flash ignition as a new ignition method has attracted lots of interest from researchers. The flash ignition can successfully achieve distributed ignition in a short time. To study the flash ignition and combustion characteristics of titanium dioxide mixed with iron nanoparticles and aluminum nanoparticles, an appropriate amount of titanium dioxide was added to the iron nanoparticles and aluminum nanoparticles to form the composite material. The ignition phenomenon of mixture materials was recorded by the high-speed camera and the temperature distribution of ignited materials was calculated by using the two-color method. The minimum ignition energy of mixture materials with different content of titanium dioxide and total mass was measured to analyze the method to decrease the minimum ignition energy. The results showed that the effect of the added titanium dioxide was insignificant on the combustion phenomenon of the iron nanoparticles. The temperature was still maintained at approximately 850 K compared with the pure iron nanoparticles. The minimum ignition energy of the mixture materials increased with the increasing content of titanium dioxide. As for the aluminum nanoparticles, titanium dioxide can enhance the explosion phenomenon occurring at the beginning of the flash ignition. In the exposure process. With the content of titanium dioxide in the range of 0%–20%, the minimum ignition energy of the mixture materials decreased greatly. The content increased to the range of 20%–40%, the minimum ignition energy was neglected. When the content was further increased to higher than 60%, the minimum ignition energy gradually increased until it gets the saturation condition.

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Inflammability of mixtures of metal oxides with aluminum

Cited by 13 publications

References 0 publications

Thermal Decomposition and Thermal Reaction Process of PTFE/Al/MnO2 Fluorinated Thermite

Thermal Decomposition and Thermal Reaction Process of PTFE/Al/MnO2 Fluorinated Thermite

Diversity in Addressing Reaction Mechanisms of Nano‐Thermite Composites with a Layer by Layer Structure

Effects of titanium dioxide additions on flash ignition characteristics of aluminum and iron nanoparticles

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