Combustion synthesis and effect of LaMnO3 and La0.8Sr0.2MnO3 on RDX thermal decomposition

Wei, Zhi-Xian; Wei, Lin; Gong, Lin; Yan, Weiping; Hu, Changwen

doi:10.1016/j.jhazmat.2009.12.068

Cited by 49 publications

(20 citation statements)

References 18 publications

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“…To some extent, the extra binder reduces the energy density of the composite propellants [17]. Some other researchers tried to mix energetic materials and catalyst directly without using any binder, but the homogeneity was not so good that it always caused the instability of thermal decomposition performance of energetic materials [18,19]. In the present work, a novel electrospray method was introduced to disperse ceria in RDX evenly.…”

Section: Introductionmentioning

confidence: 97%

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Electrospray formation of RDX/ceria mixture and its thermal decomposition performance

Han

Wang

et al. 2015

J Therm Anal Calorim

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Catalyst could significantly improve thermal decomposition performance of energetic materials. However, different approaches for dispersing catalyst into energetic materials lead to quite different results. Generally, improved homogeneity of the mixture always results in better performance. In this paper, a novel method was applied on synthesizing nanoceria; at the same time, electrospray method was introduced to produce homogenous RDX/ceria micropowder. The mixture was characterized and tested by scanning electron microscope-energy-dispersive spectroscopy and differential scanning calorimetry-thermogravimetry. Kissinger method was employed to calculate activation energy of different specimens according to DSC data. Results indicated that with electrospray formation, catalyst (nanoceria) could be evenly dispersed into RDX. In contrast to pure RDX, RDX/ceria mixture could decompose at a lower temperature and has lower activation energy. The calculation results of critical explosion temperature indicated that the mixture is safe for storage and process operation. This study points out a potential way to develop new method to make energetic/catalyst mixture.

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Section: Introductionmentioning

confidence: 97%

“…Recently, some researchers noticed that several oxides of rare earth element have good activities in catalyzing the decomposition process of RDX in contrast to traditional transition element oxides. Therefore, much attention has been paid to the synthesis method of rare earth element oxide and its application as catalysts [8,9].…”

Section: Introductionmentioning

confidence: 99%

Electrospray formation of RDX/ceria mixture and its thermal decomposition performance

Han

Wang

et al. 2015

J Therm Anal Calorim

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“…It is widely accepted that two different types of oxygen species can be distinguished on the perovskite's surface: lattice oxygen (metal bonded oxygen O 2À ) at lower binding energy values and chemisorbed oxygen at higher binding energy values, which can be assigned to oxygen species with lower electron density. The adsorbed oxygen species on the surface of the powder particles come from hydroxyl groups, water and/or carbonate species [31,32].…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 99%

Synthesis of LaAlO3 based materials for potential use as methane-fueled solid oxide fuel cell anodes

Silva

Miranda

2015

International Journal of Hydrogen Energy

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“…Previous studies have reported that the relative ratio of the adsorbed oxygen to lattice oxygen, O adsorbed /O lattice , can be used as an index to evaluate catalytic activity (Hwang et al, 2010;Sun et al, 2011;Liang et al, 2013). As shown in Table 2 (Niu et al, 2006;Wei et al, 2010). Since adsorbed oxygen is loosely bound to the catalyst surface, the adsorbed oxygen species easily move to the reaction sites.…”

Section: Surface Analysis By Xpsmentioning

confidence: 99%

Influence of Sr Substitution on Catalytic Performance of LaMnO3/Ni Metal foam Composite for CO Oxidation

Peng

Tsai

Yeh

et al. 2015

Aerosol Air Qual. Res.

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A series of Sr-substituted lanthanum manganite perovskites, La 1-x Sr x MnO 3 (LSMO, x = 0, 0.1, 0.2, and 0.3), with mesoporous structures were prepared and coated onto a three-dimensional Ni metal foam (MF) as composite catalysts. ), which increased the number of active centers for oxidation and thus enhanced the oxidizing ability of the catalyst. The high activity and excellent stability of La 0.8 Sr 0.2 MnO 3 /MF catalyst can be ascribed to a synergistic effect between the mesoporous structure and the high number of adsorbed oxygen species of the catalyst as well as the interconnected three-dimensional reticular configuration of the nickel metal support, which increases the number of active sites and enhances mass transfer for CO and O 2 . La 0.8 Sr 0.2 MnO 3 /MF composite can potentially be used in catalytic converters for CO removal of automotive exhaust gases.

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Combustion synthesis and effect of LaMnO3 and La0.8Sr0.2MnO3 on RDX thermal decomposition

Cited by 49 publications

References 18 publications

Electrospray formation of RDX/ceria mixture and its thermal decomposition performance

Electrospray formation of RDX/ceria mixture and its thermal decomposition performance

Synthesis of LaAlO3 based materials for potential use as methane-fueled solid oxide fuel cell anodes

Influence of Sr Substitution on Catalytic Performance of LaMnO3/Ni Metal foam Composite for CO Oxidation

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