A novel process to prepare MoSi2 by reaction between MoS2 and Si

Zhang, G.H.; Sun, Guodong; Chou, Kuo‐Chih

doi:10.1016/j.jallcom.2016.10.041

Cited by 12 publications

(11 citation statements)

References 19 publications

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“…The formed SiS has a high saturated vapor pressure, which makes it easy to escape from the sample and cannot be detected in the final product. 20,34 However, when the temperature is 800 and 900°C, besides MoSi 2 , there is also SiS 2 . The presence of SiS 2 can be attributed to the disproportionation reaction of SiS, as described by reaction (2).…”

Section: Silicothermic Reduction Of Mosmentioning

confidence: 99%

“…The presence of SiS 2 can be attributed to the disproportionation reaction of SiS, as described by reaction (2). 20,34 As the temperature rises from 900 to 1000°C, SiS 2 disappears. When the temperature is higher than 1000°C, all the generated SiS gas escaped from the inner layer to the desulfurization layer.…”

Section: Silicothermic Reduction Of Mosmentioning

confidence: 99%

“…18,19 The complexity of the above process leads to a high molybdenum source cost. In order to shorten the process and reduce the cost, Zhang et al 20 proposed a new method to synthesize MoSi 2 via A survey of the published literature modeling of CMCs has been studied by a n ers. Processes that have been modeled CVD, 17,18 CVI, [19][20][21][22] and Sol-Gel Infiltrat of alumina matrix in eight-harness satin has been studied numerically in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In order to shorten the process and reduce the cost, Zhang et al 20 proposed a new method to synthesize MoSi 2 via A survey of the published literature modeling of CMCs has been studied by a n ers. Processes that have been modeled CVD, 17,18 CVI, [19][20][21][22] and Sol-Gel Infiltrat of alumina matrix in eight-harness satin has been studied numerically in Ref. [ proaches used in the above work general ing the flow of a high viscosity resin thr and modeling the chemical reactions and during processing.…”

Section: Introductionmentioning

confidence: 99%

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A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

2021

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The extraction of metal from sulfide mineral is usually accompanied by the emission of sulfur-containing gas (e.g., SO 2 ), which will cause serious pollution to the environment. In this work, a sulfur-emission free route for preparing ultrafine molybdenum disilicide (MoSi 2 ) powder by silicothermic reduction of MoS 2 with the desulfurization agent of lime was proposed. The internal MoS 2 -Si mixture is wrapped in an external desulfurization layer composed of lime. After the reaction is completed, the prepared MoSi 2 can be easily separated from the desulfurization layer by using a non-chemical method. In addition, when the reaction temperature is higher than 1000°C, almost all S in MoS 2 is transformed to sulfurcontaining gas SiS, which can be fully captured by lime to generate CaS, Si, and CaSiO 3 . For the raw material with a MoS 2 :Si molar ratio of 1:4, after reacting at 1000, 1100, and 1200°C for 2 h, the average grain sizes of the obtained MoSi 2 powder are approximately 100, 300, and 800 nm, respectively. Moreover, when the reaction time is prolonged from 2 to 6 h at 1000°C, the average grain size of the acquired MoSi 2 powder is about 200 nm, and the residual sulfur content is about 0.12%. This work provides a new insight to extract metals or metal compounds from sulfide ores without releasing sulfur-containing gas.

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Section: Silicothermic Reduction Of Mosmentioning

confidence: 99%

Section: Silicothermic Reduction Of Mosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

2021

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“…Molybdenum disilicide emerges as a potential candidate for the high‐temperature structural applications . It has a high melting point (2280°C), low density (6.24 g/cm 3 ), high elastic modulus (377 GPa), and high hardness value (12.5 GPa) .…”

Section: Introductionmentioning

confidence: 99%

In situ single‐step reduction and silicidation of MoO₃ to form MoSi₂

2018

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Nanocrystalline molybdenum disilicide (MoSi2) is synthesized in a specially designed autoclave at 900°C. The XRD results revealed that the formation of MoSi2 is favorable with the blend of MoO3, Si, and Mg powders. The HR‐TEM and SAED patterns confirm the formation of MoSi2 phase. The structural parameters (crystallite size, strain, stress, and deformation energy density) are calculated using the Williamson‐Hall (W‐H) analysis. The formation mechanism involved in the synthesis of MoSi2 is proposed. The nonisothermal oxidation kinetics (~1200°C) of MoSi2 phase is examined through the thermal analysis techniques. The activation energy is determined by the Kissinger‐Akahira‐Sunsose isoconversional kinetic model. Finally, the reaction mechanism involved during the oxidation of MoSi2 phase is identified using the integral master‐plots method.

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First-principles investigation of new structure, mechanical and electronic properties of Mo-based silicides

Pan

Wang

Zhang

et al. 2018

Ceramics International

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A novel process to prepare MoSi2 by reaction between MoS2 and Si

Cited by 12 publications

References 19 publications

A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

In situ single‐step reduction and silicidation of MoO₃ to form MoSi₂

First-principles investigation of new structure, mechanical and electronic properties of Mo-based silicides

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A novel process to prepare MoSi2 by reaction between MoS2 and Si

Cited by 12 publications

References 19 publications

A novel sulfur‐emission free route for preparing ultrafine MoSi2 powder by silicothermic reduction of MoS2

A novel sulfur‐emission free route for preparing ultrafine MoSi2 powder by silicothermic reduction of MoS2

In situ single‐step reduction and silicidation of MoO3 to form MoSi2

First-principles investigation of new structure, mechanical and electronic properties of Mo-based silicides

Contact Info

Product

Resources

About

A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

In situ single‐step reduction and silicidation of MoO₃ to form MoSi₂