Author
Aashish Gautam
Bio: Aashish Gautam is an academic researcher from Defence Institute of Advanced Technology. The author has contributed to research in topics: Burn rate (chemistry) & Ammonium perchlorate. The author has an hindex of 1, co-authored 1 publications receiving 9 citations.
Papers
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TL;DR: In this paper, the iron oxide nanoparticles (γ-Fe2O3) were synthesized without and with capping agent (coconut oil) before thoroughly characterized for their phase purity.
19 citations
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TL;DR: It is shown that the introduction of hybrid filler nanoparticles into polymer matrices enhances both the macro- and microproperties of final composites as a result of synergistic effects of individual components and the simultaneous formation of an oriented filler network in the polymer.
21 citations
TL;DR: In this article, the effect of IRO content and its specific surface area on burn rate characteristics of composite solid propellant has been investigated and it was observed that IRO is a good burn rate enhancer.
14 citations
TL;DR: The characterization and application of two promising nanocatalysts for the thermal decomposition of ammonium perchlorate and tertiary and quaternary amine groups play a critical role, where the presence of an extra proton could favor an electron-proton transfer as the rate-determining step.
Abstract: This work reports the characterization and application of two promising nanocatalysts for the thermal decomposition of ammonium perchlorate (AP). To obtain these composite materials, magnetite nanoparticles (Fe3O4 NPs) were functionalized with two different amine derivative groups, tertiary amine (Fe3O4 NPs-A1) and quaternary amine. X-ray photoelectron spectroscopy and differential scanning calorimetry provided mechanistic insights into the thermal decomposition of AP. Furthermore, tertiary and quaternary amine groups play a critical role, where the presence of an extra proton could favor an electron-proton transfer as the rate-determining step. Moreover, Fe3O4 NPs-A1 causes a diminution of the high-temperature decomposition of AP positively to 335 °C, increasing the energy release by 278 J g-1 and consequently affording the lowest activation energy (102 kJ mol-1), indicating a low degree of thermal stability, and accelerating the thermal decomposition of AP.
12 citations
TL;DR: In this paper, a solution combustion synthesis (SCS) method was used to obtain nanopowders of iron oxides from sol-gel compositions containing iron nitrates and soluble organic reducing agents (glycine, urea, citric acid).
12 citations
TL;DR: In this paper, the fiber-like bis-(dimethylglyoximato) nickel(II) complex, Ni(DMG)2 was successfully synthesized and the obtained samples were characterized by SEM-EDS, FT-IR, XRD, and XPS.
Abstract: The fiber-like bis-(dimethylglyoximato) nickel(II) complex, Ni(DMG)2 was successfully synthesized. The obtained samples were characterized by SEM-EDS, FT-IR, XRD, and XPS. The TG-DSC-FTIR-MS coupling technique was used to characterize the thermal decomposition behavior and evolved gas analysis of Ni(DMG)2. The non-isothermal decomposition reaction kinetic parameters were obtained by both combined kinetic analysis and isoconversional Vyazovkin methods. It was found that Ni(DMG)2 begins to decompose at around 280 °C, and a sharp exothermic peak is observed in the DSC curve at about 308.2 °C at a heating rate of 10 °C·min−1. The main gaseous products are H2O, NH3, N2O, CO, and HCN, and the content of H2O is significantly higher than that of the others. The activation energy obtained by the combined kinetic analysis method is 170.61 ± 0.65 kJ·mol−1. The decomposition process can be described by the random nucleation and growth of the nuclei model. However, it was challenging to attempt to evaluate the reaction mechanism precisely by one ideal kinetic model.
7 citations