Thermal disproportionation of SnO under high pressure

Giefers, Hubertus; Porsch, F.; Wortmann, G.

doi:10.1016/j.ssi.2005.03.003

Cited by 17 publications

(6 citation statements)

References 16 publications

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“…The analyses yield an activation energy at ambient condition of E A = 16(3) kJ/mol and at about 26 GPa of 10(3) kJ/mol. These values have a similar order of magnitude as a recent study on the radiation-induced decomposition of SnO ( E A = 25(7) kJ/mol), which also used synchrotron radiation …”

Section: Resultssupporting

confidence: 69%

“…The time-dependent concentrations of the unreacted energetic material (Figures a−11a), (1 − α), with α (0 ≤ α ≤ 1) representing the reaction progress, were evaluated by implementing Avrami−Erofeyev kinetics by using the linearized form We used the Sharp−Hancock plot, − ln(−ln(1 − α)) vs ln( t ), to obtain the reaction exponent m , which is an important indicator of the rate-determining reaction step, and also the reaction rate constant k . The reaction exponent m is the slope, and m ·ln( k ) is the intercept with the ordinate in the Sharp−Hancock plot for the interval α = 0.2−0.63 (see Table 3 of ref ). The time progressions for the runs from Figures a−11a are shown as Sharp−Hancock plots in Figures b−11b, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Radiation-Induced Decomposition of PETN and TATB under Extreme Conditions

Giefers

Pravica

2008

J. Phys. Chem. A

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We conducted a series of experiments investigating decomposition of secondary explosives PETN and TATB at varying static pressures and temperatures using synchrotron radiation. As seen in our earlier work, the decomposition rate of TATB at ambient temperature slows systematically with increasing pressure up to at least 26 GPa but varies little with pressure in PETN at ambient temperature up to 15.7 GPa, yielding important information pertaining to the activation complex volume in both cases. We also investigated the radiation-induced decomposition rate as a function of temperature at ambient pressure and 26 GPa for TATB up to 403 K, observing that the decomposition rate increases with increasing temperature as expected. The activation energy for the TATB reaction at ambient temperature was experimentally determined to be 16 +/- 3 kJ/mol.

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Section: Resultssupporting

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Radiation-Induced Decomposition of PETN and TATB under Extreme Conditions

Giefers

Pravica

2008

J. Phys. Chem. A

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“…It has been reported that the decomposition rate of SnO into SnO 2 and Sn remarkably increases under high pressure (215 GPa). 34) Therefore, the decomposition rate would also increase under the SPS pressure (500 MPa), which leads to the decomposition of the sample during the SPS process. Table 1 summarizes the lattice parameters and densities of the samples.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of High-Density Bulk Tin Monoxide and Its Thermoelectric Properties

et al. 2018

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SnSe exhibits exceptionally high thermoelectric (TE) figure of merit zT mainly due to its ultralow lattice thermal conductivity (¬ lat) [L.-D. Zhao et al.: Nature 508 (2014) 373.]. It is considered that strong lattice anharmonicity caused by the lone pair electrons of Sn 2+ results in the ultralow ¬ lat. Here, we focus on SnO because it has the lone pair electrons of Sn 2+ like SnSe. Bulk samples of SnO were synthesized by low-temperature high-pressure spark plasma sintering and their TE properties were examined. The present study revealed that SnO exhibits very low ¬ lat (1.44 Wm ¹1 K ¹1 at 573 K) compared with SnO 2 which has no lone pair electrons. The Grüneisen parameter (£) of SnO was evaluated to be 1.70 and this high £ leads to large lattice anharmonicity and thereby low ¬ lat. Even though SnO has low ¬ lat , the zT values were significantly low compared with SnSe. The maximum zT value of SnO was 0.00141 at 573 K. Since the main reason of this low zT is its non-optimized carrier concentration, the zT of SnO can be enhanced through the carrier concentration optimization.

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“…The black-blue SnO powder synthesized for such an application always contains a small amount of Sn(IV) oxide due to traces of oxygen that promote Sn(II) oxidation and hinder the stabilization of the anode structure. Therefore, the main objective in SnO preparation is to minimize the oxidation of Sn(II) [3][4][5] . Moreover, the practical charge capacity is strongly dependent of the crystalline microstructure properties.…”

Section: Introductionmentioning

confidence: 99%

Structural and microstructural characterization of tin(II) oxide useful as anode material in lithium rechargeable batteries obtained from a different synthesis route at room temperature

et al. 2011

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Tin (II) oxide has been proposed as potential anode material in lithium rechargeable batteries. Different methods to obtain such compound have been developed with relative difficulty due to the fact that Sn(II) is easily oxidized to Sn(IV). We have applied a different methodology to synthesize SnO-romarchite by modifying the solvent nature of the controlled precipitation route using acetic acid and not water. Although the formation of Sn(IV) oxide could not be completely avoided, X-ray diffraction analysis confirmed the synthesis of metastable tin(II) oxide as major phase at room temperature. In depth analysis using Popa's model for Rietveld refinement allows to precise that the material corresponds to small and distorted crystallites, very anisotropic in size. SEM technique confirmed the microstructure is build of flower-like agglomerates of ~15 μm, in turn made of plate-like individual grains that remind the crystallite structure anisotropy.

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Thermal disproportionation of SnO under high pressure

Cited by 17 publications

References 16 publications

Radiation-Induced Decomposition of PETN and TATB under Extreme Conditions

Radiation-Induced Decomposition of PETN and TATB under Extreme Conditions

Synthesis of High-Density Bulk Tin Monoxide and Its Thermoelectric Properties

Structural and microstructural characterization of tin(II) oxide useful as anode material in lithium rechargeable batteries obtained from a different synthesis route at room temperature

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