Thermal behaviour of corona-precipitated iodine oxides

Wikjord, AG; Taylor, Peter G.; Torgerson, D.F.; Hachkowski, L.

doi:10.1016/0040-6031(80)87032-8

Cited by 21 publications

(13 citation statements)

References 14 publications

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“…S2), and this similar behavior was further confirmed with in situ heating XRD (Table II). Given that the previous report proposed the formula I 4 O 9 ÁxH 2 O without any chemical composition or any crystal structure information, 40 we conjecture that the proposed formula may be in error.…”

Section: B Preparation Of D-hiomentioning

confidence: 87%

Aerosol synthesis of phase pure iodine/iodic biocide microparticles

SyBing

Wang

et al. 2017

J. Mater. Res.

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Section: B Preparation Of D-hiomentioning

confidence: 87%

Aerosol synthesis of phase pure iodine/iodic biocide microparticles

SyBing

Wang

et al. 2017

J. Mater. Res.

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“…In a 1972 review of the halogen oxides, Brisdon 14 discussed seven iodine oxide species: 10, 10 2 , 100, 10 3 , 10 4 , 1 2 0 4 , and 1 2 0 5 , Whereas there was a spectroscopic characterization given for 10, there was only structural information in the condensed phase given for 1 2 0 4 and 1 2 0 5 , 10 2 and 10 3 were mentioned only in terms of their presumed formation in iodate solutions. A later review (1980) by Wikjord et al 15 suggested that 1 2 0 4 , 1 2 0 5 , and 1409 have been isolated and fully characterized. crystallographic ally .…”

Section: Introductionmentioning

confidence: 99%

NIST–JANAF Thermochemical Tables for the Iodine Oxides

Chase

1996

Journal of Physical and Chemical Reference Data

1,193

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The thermodynamic and spectroscopic properties of the iodine oxide species have been reviewed. Recommended Nl.sT-JANAF Thermochemical Tables are given for six gaseous iodine oxides: 10, 010, 100, 101, lIO, and 1°3 , Sufficient information is not available to generate thermochemical tables for any condensed phase species. Annotated bibliographies (over 400 references) are provided for all neutral iodine oxides which have been reported in the literature. There is a lack of experimental thermodynamic and spectroscopic information for all iodine oxide species, except IO(g) and OIO(g). The recommended thermochemical tables are based on estimates for the structure, vibrational frequencies, and enthalpy of formation based in part on the spectroscopic and thermodynamic data for the other halogen oxides [1. Phys. Chern. Ref. Data 25, 551 (1996); •25, 1061 (1996)]. Although there is a definite lack of information in comparison with the other halides, this information is provided for the iodine oxides for the following reasons: (1) to complete the study of the halogen oxide family and (2) to stress the need for additional experimental measurements. Of all the species mentioned in the literature, many have not been isolated or characterized. In fact, some do not exist. Throughout this paper, uncertainties attached to recommended values correspond to the uncertainty interval, equal to twice the standard deviation of the mean.

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“…Mixture homogeneity can be optimized using a carrier fluid to aid intermixing of the reactants. The I 4 O 9 examined in this study is more stable than previously studied I 4 O 9 samples and did not appear to decompose into I 2 O 5 or form hydrated species seen in Wikjord et al 6 (as seen in Figure 1a with only an exotherm corresponding to I 4 O 9 decomposition). However, the only way to observe the combustion performance of Al + I 4 O 9 is by dry mixing with as little exposure to the atmosphere as possible in order to maintain the integrity of I 4 O 9 .…”

Section: Preparation Of Flame Tubesmentioning

confidence: 68%

“…But, I 4 O 9 powder is usually unstable. In fact, Wikjord et al 6 showed that over very short times I 4 O 9 decomposed into I 2 O 5 even with limited exposure to the atmosphere. This instability limits the usefulness of I 4 O 9 as an oxidizer in combustion applications.…”

Section: Introductionmentioning

confidence: 99%

“…There are many iodine oxide compounds (e.g., HIO 3 , HI 3 O 8 , I 2 O 5 , I 4 O 9 ) but the one most commonly studied for reaction with aluminum (Al) is diiodide pentoxide, I 2 O 5 [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] . There are reasons for favoring I 2 O 5 for combustion with Al: (1) I 2 O 5 has an oxidation state of five which makes it a strong oxidizer for combustion applications; (2) I 2 O 5 is semi-stable, depending on atmospheric conditions, and easily handled in powder form; and (3) I 2 O 5 is relatively easy to produce and readily available.…”

Section: Introductionmentioning

confidence: 99%

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Reaction Kinetics and Combustion Dynamics of I<sub>4</sub>O<sub>9 </sub>and Aluminum Mixtures

Smith

Pantoya

Parkey

et al. 2016

JoVE

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Tetraiodine nonoxide (I 4 O 9 ) has been synthesized using a dry approach that combines elemental oxygen and iodine without the introduction of hydrated species. The synthesis approach inhibits the topochemical effect promoting rapid hydration when exposed to the relative humidity of ambient air. This stable, amorphous, nano-particle material was analyzed using differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA) and showed an exothermic energy release at low temperature (i.e., 180 °C) for the transformation of I 4 O 9 into I 2 O 5 . This additional exothermic energy release contributes to an increase in overall reactivity of I 4 O 9 when dry mixed with nano-aluminum (Al) powder, resulting in a minimum of 150% increase in flame speed compared to Al + I 2 O 5 . This study shows that as an oxidizer, I 4 O 9 has more reactive potential than other forms of iodine(V) oxide when combined with Al, especially if I 4 O 9 can be passivated to inhibit absorption of water from its surrounding environment.

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Thermal behaviour of corona-precipitated iodine oxides

Cited by 21 publications

References 14 publications

Aerosol synthesis of phase pure iodine/iodic biocide microparticles

Aerosol synthesis of phase pure iodine/iodic biocide microparticles

NIST–JANAF Thermochemical Tables for the Iodine Oxides

Reaction Kinetics and Combustion Dynamics of I<sub>4</sub>O<sub>9 </sub>and Aluminum Mixtures

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