Analyses of the thermal decomposition of urea nitrate at high temperature

Désilets, S.; Brousseau, Patrick; Chamberland, Daniel; Singh, Shanti; Feng, Hongtu; Turcotte, Richard; Armstrong, Kelly; Anderson, John R.

doi:10.1016/j.tca.2011.04.004

Cited by 29 publications

(28 citation statements)

References 29 publications

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“…[23] The deduction of ad etailed mechanism for the thermal decay of (1)-(3)r emains difficult though. The www.chemasianj.org signal corresponding to (m/z + 44) can be correlated with the evolution of carbon dioxide or nitrous oxide.T he IR signals correspondingt ot he different signal intensities of the Gram-Schmidt signal were recorded to identify the variousg ases being released as ar esult of the precursor combustion.…”

Section: Resultsmentioning

confidence: 99%

“…This is in good agreement with observedt hermald ecomposition products of urea complexes with metal nitrates. [23] The deduction of ad etailed mechanism for the thermal decay of (1)-(3)r emains difficult though. Clearly consecutive processeso ccur in all cases, but the determinable gaseous reaction products from MS or FTIR do not vary significantly to securely trace down ad etailed decomposition pathway.…”

Section: (H 2 O)mentioning

confidence: 99%

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Aqueous Solution Processing of Combustible Precursor Compounds into Amorphous Indium Gallium Zinc Oxide (IGZO) Semiconductors for Thin Film Transistor Applications

Sanctis

Hoffmann

Koslowski

et al. 2018

Chemistry An Asian Journal

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Combustion synthesis of semiconducting amorphous indium gallium zinc oxide IGZO (In:Ga:Zn, 7:1:1.5) thin films was carriedo ut using urea nitrate precursor compounds of indium(III), gallium(III) and zinc(II).T hisa pproach provides further understanding towards the oxide formation process under am oderate temperature regime by employment of well-defined coordination compounds.A ll precursor compoundsw ere fully characterizedb ys pectroscopic techniques as well as by single crystal structure analysis. Their intrinsic thermal decomposition was studied by ac ombination of differentials canningc alorimetry (DSC) and thermogravimetry coupled with mass spectrometry and infrared spectroscopy (TG-MS/IR). For all precursors am ultistep decomposi-tion involving ac omplex redox-reaction pathway under in situ formation of nitrogen containing molecular speciesw as observed. Controlled thermalc onversion of am ixture of the indium,g allium and zinc urea nitratec omplexes into ternary amorphous IGZO films could thus be achieved.T hin film transistors (TFTs) were fabricated from ad efined compositional mixture of the molecular precursors. The TFT devices exhibited decent chargec arrierm obilitieso f0 .4 and 3.1 cm 2 /(Vs) after annealing of the deposited films at temperaturesa sl ow as 250 and 350 8C, respectively.T his approach represents as ignificant step furthert owards al ow temperature solution processing of semiconducting thin films.[ + ++ + ] X-ray crystal structure determination.[ + + ] XPS investigation.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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Section: Resultsmentioning

confidence: 99%

Section: (H 2 O)mentioning

confidence: 99%

Aqueous Solution Processing of Combustible Precursor Compounds into Amorphous Indium Gallium Zinc Oxide (IGZO) Semiconductors for Thin Film Transistor Applications

Sanctis

Hoffmann

Koslowski

et al. 2018

Chemistry An Asian Journal

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“…On one hand, a loss of water vapor can occur, indicative of a hydration process (humidity and adsorbed water). On the other hand, the initial loss could be a clear indicator of the amount of residual gasification components in the obtained powders, which can be emitted at those temperatures as a result of a lower reaction effectiveness . For a complete reaction, this characteristic loss should be practically zero as it is in the case of NiCr 2 O 4 spinel.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, the initial loss could be a clear indicator of the amount of residual gasification components in the obtained powders, which can be emitted at those temperatures as a result of a lower reaction effectiveness. 27,43 For a complete reaction, this characteristic loss should be practically zero as it is in the case of NiCr 2 O 4 spinel. Secondly, at T%400°C sample experiences another loss that would be related to a dehydroxylation process as a result of a previous formation of hydroxides in the sample, concretely Al(OH) 3 during wet-milling process.…”

Section: Resultsmentioning

confidence: 99%

Effects of composition and furnace temperature on (Ni, Co) (Cr, Al)₂O₄ pigments synthesized by solution combustion route

Gilabert

Palacios

Sanz

et al. 2017

Int J Applied Ceramic Tech

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The effects of composition and furnace temperature on Ni 1-Ψ Co Ψ Cr 2À2Ψ Al 2Ψ O 4 (0≤Ψ≤1) pigments prepared by Solution Combustion Synthesis were studied.As-synthesized samples showed spinel-like spongy structure, very easy to grind. However, important differences on crystallinity, crystal size, and microstructure were observed depending on composition and furnace temperature. All pigments developed intense tones, covering a wide color palette because of composition influence, although little effect was observed with furnace temperature. Stable crystalline structures, suitable grain size, and high resistance against synthesizing variables and ceramic glazes make SCS pigments perfect candidates to be used in the ceramic ink-jet decoration.

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“…Under acidic conditions, urea precipitates in the form of salts, for example, with a nitric acid such as (NH 2 ) 2 CO HNO 3 . Urea nitrate decomposes explosively upon heating, but heating pure urea leads to its decomposition at a temperature of 168 1C [32]. The combination of these properties makes urea a very attractive component of the combustion synthesis reactions.…”

Section: Resultsmentioning

confidence: 99%

Solution combustion synthesis of α-Al2O3 using urea

Журавлев

Бамбуров

Бекетов

et al. 2013

Ceramics International

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The processes involved in the solution combustion synthesis of a-Al 2 O 3 using urea as an organic fuel were investigated. The data describing the influence of the relative urea content on the characteristic features of the combustion process, the crystalline structure and the morphology of the aluminium oxide are presented herein. Our data demonstrate that the combustion of stable aluminium nitrate and urea complexes leads to the formation of a-alumina at temperatures of approximately 600-800 1C. Our results, obtained using differential thermal analysis and IR spectroscopy methods, reveal that the low-temperature formation of a-alumina is associated with the thermal decomposition of an a-AlO(OH) intermediate, which was crystallised in the crystal structure of the diaspore.

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Analyses of the thermal decomposition of urea nitrate at high temperature

Cited by 29 publications

References 29 publications

Aqueous Solution Processing of Combustible Precursor Compounds into Amorphous Indium Gallium Zinc Oxide (IGZO) Semiconductors for Thin Film Transistor Applications

Aqueous Solution Processing of Combustible Precursor Compounds into Amorphous Indium Gallium Zinc Oxide (IGZO) Semiconductors for Thin Film Transistor Applications

Effects of composition and furnace temperature on (Ni, Co) (Cr, Al)₂O₄ pigments synthesized by solution combustion route

Solution combustion synthesis of α-Al2O3 using urea

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Analyses of the thermal decomposition of urea nitrate at high temperature

Cited by 29 publications

References 29 publications

Aqueous Solution Processing of Combustible Precursor Compounds into Amorphous Indium Gallium Zinc Oxide (IGZO) Semiconductors for Thin Film Transistor Applications

Aqueous Solution Processing of Combustible Precursor Compounds into Amorphous Indium Gallium Zinc Oxide (IGZO) Semiconductors for Thin Film Transistor Applications

Effects of composition and furnace temperature on (Ni, Co) (Cr, Al)2O4 pigments synthesized by solution combustion route

Solution combustion synthesis of α-Al2O3 using urea

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Product

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Effects of composition and furnace temperature on (Ni, Co) (Cr, Al)₂O₄ pigments synthesized by solution combustion route