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Lee, Sang-Kwon; Seo, Dong‐Bum; Won, C.W.; Borovinskaya, I. P.; Вершинников, В. И.

doi:10.1023/a:1012426808855

Cited by 11 publications

(2 citation statements)

References 7 publications

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“…The figure shows that after the combustion reaction, the volume of the initial compact has considerably increased and the product has gained a layered structure. These phenomena that have been observed in other SHS reaction studies, are supposed to be a physical consequence of the evolution of gaseous products from the compact at high system temperatures [44]. phase confirms the occurrence of magnesiothermic reduction reactions (equations (4) and (5)).…”

Section: Experimental Findingssupporting

confidence: 84%

Synthesis of nanocrystalline TiB2 powder from TiO2, B2O3 and Mg reactants through microwave-assisted self-propagating high-temperature synthesis method

et al. 2016

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In this research work, microwave-assisted self-propagating high-temperature synthesis (SHS) process was employed for the fabrication of titanium diboride (TiB 2) compound from TiO 2-B 2 O 3-Mg mixtures. Thermodynamic evaluations of this system and its relevant subsystems revealed that TiB 2-MgO composite powder can be easily produced by a SHS reaction. However, experimental results of a TiO 2 : B 2 O 3 : 5Mg mixture heated in a domestic oven showed the formation of some intermediate compounds such as Mg 3 B 2 O 6 , presumably due to some degree of Mg loss. The optimum amount of Mg in TiO 2 : B 2 O 3 : xMg mixtures, yielding the highest amount of TiB 2 phase, was found to be around 7 mol, i.e., 40 mol% more than the stoichiometric amount. Experimental results revealed that a pure TiB 2 compound could be obtained by leaching the unwanted by-products in an HCl acid solution. Scanning electron microscopic observations and Scherrer calculations showed that the produced TiB 2 contains sub-micron (150-200 nm) particles, where each particle consists of a number of nanosized (32 nm) crystallites.

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Section: Experimental Findingssupporting

confidence: 84%

Synthesis of nanocrystalline TiB2 powder from TiO2, B2O3 and Mg reactants through microwave-assisted self-propagating high-temperature synthesis method

et al. 2016

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“…Thermochemical characteristics of a self‐extending high‐temperature synthesis (SHS) in the compressed mixture (of stoichiometric content) of tungsten (VI) oxide and zinc powder have been investigated by Lee et al 7 It was found that burning of a mixture in an inert atmosphere (argon) is possible only within a certain range of inert gas pressure. At the same time the temperature and other characteristics of burning strongly depend on argon pressure in the interval between 0 and 2.5 MPa.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Modeling of Phase Equilibria in the WO₃‐Zn System

Шубин

Shunyaev

2007

Israel Journal of Chemistry

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There are no alloys in the W‐Zn binary system. The combustion process in the WO3‐Zn powder mixture gives mainly metallic tungsten and zinc oxide. The ZnO in the product can be easily leached (e.g., with HCl), so that from stoichiometric quantities of reagents, one can obtain W powder of good purity. Here we investigated the phase equilibria for the WO3‐Zn system in the temperature range of 900‐1500 K. The inert component (Ar) was introduced into the system to change the pressure within the range of 0.1‐0.5 MPa. When the pressure is constant, the quantity of tungsten dioxide in the equilibrium mixture of components increases with rise in temperature, while the fraction of the zinc oxide decreases. The fraction of metallic tungsten in the mixture also decreases with temperature increase and becomes near zero at 1500 K and 0.1 MPa. Up to 1100 K, the output of tungsten is close to the limiting (stoichiometric) value in the whole considered pressure range (0.1‐0.5 MPa).

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Tungsten oxide nanoparticles synthesised by laser assisted homogeneous gas-phase nucleation

Alm

Landström

Boman

et al. 2005

Applied Surface Science

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Untitled

Cited by 11 publications

References 7 publications

Synthesis of nanocrystalline TiB2 powder from TiO2, B2O3 and Mg reactants through microwave-assisted self-propagating high-temperature synthesis method

Synthesis of nanocrystalline TiB2 powder from TiO2, B2O3 and Mg reactants through microwave-assisted self-propagating high-temperature synthesis method

Thermodynamic Modeling of Phase Equilibria in the WO₃‐Zn System

Tungsten oxide nanoparticles synthesised by laser assisted homogeneous gas-phase nucleation

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Untitled

Cited by 11 publications

References 7 publications

Synthesis of nanocrystalline TiB2 powder from TiO2, B2O3 and Mg reactants through microwave-assisted self-propagating high-temperature synthesis method

Synthesis of nanocrystalline TiB2 powder from TiO2, B2O3 and Mg reactants through microwave-assisted self-propagating high-temperature synthesis method

Thermodynamic Modeling of Phase Equilibria in the WO3‐Zn System

Tungsten oxide nanoparticles synthesised by laser assisted homogeneous gas-phase nucleation

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Product

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Thermodynamic Modeling of Phase Equilibria in the WO₃‐Zn System