Synthesis and characterization of micro-spherical tungsten-molybdenum alloy particles using spray drying combined with microwave assisted calcination process

Guo, Lei; Zhang, Yuhang; Yi, Wei; Xin, Zena; Li, Jigang; Zhang, Junmin; Zhao, Jiachun; Chen, Jialin; Yao, Chensiqi

doi:10.1016/j.ijrmhm.2018.08.004

Cited by 18 publications

(3 citation statements)

References 19 publications

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“…Moreover, different particle size distribution and microstructure of particles atomized can be obtained by controlling spray drying parameters [16, 18, 20, 22, 23]. In our previous study, high-performance ruthenium, micro-spherical tungsten-molybdenum alloy, and ruthenium compound particles were achieved by the spray drying process [21–23]. Therefore, the spray drying method can be chosen to synthesize nanoscale spherical W particles by optimizing spray drying parameters.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Nanoscale Tungsten Particles with Hollow Superstructure Using Spray Drying Combined with Calcination Process

Zhao

Cao

et al. 2019

Nanoscale Res Lett

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Nanoscale tungsten (W) powder is used in some special materials. In this study, a hollow superstructure W powder consisting of nanoparticles was synthesized by spray drying combined with two-step calcination from commercial (NH 4 ) 6 W 7 O 24 ·6H 2 O. The high-pressure gas (HPG) was the significant factor in spray drying process, which affect the BET surface area and average particles size of the spray-dried powders. The detailed influences of calcined steps and calcination temperature in the microstructure and average particles size of final W particles were investigated. The size distribution of as-synthesized nanoscale W particles with hollow superstructure was from 40 to 200 nm, and the average size was about 100 nm. The as-synthesized W powder shows good sintering properties. It should be noted that the powder technology in this study can be used to synthesize other powders with high-performance requirements. Graphical abstract .

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Nanoscale Tungsten Particles with Hollow Superstructure Using Spray Drying Combined with Calcination Process

Zhao

Cao

et al. 2019

Nanoscale Res Lett

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“…Figure 5 b displays the results of the experimental residual analysis, indicating a virtually straight and outlier-free distribution of the experimental residual values. As a result, the selected model demonstrates soundness, close alignment of experimental results with expected values, and effective capture of the relationship between factors and response values [ 33 ].…”

Section: Resultsmentioning

confidence: 99%

A New Process for Efficient Recovery of Rhodium from Spent Carbonyl Rhodium Catalyst by Microreactor

Guo,

Niu,

et al. 2023

Materials

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Triphenylphosphine acetylacetone carbonyl rhodium (ROPAC) is an important catalyst in the petrochemical industry, and its deactivated waste catalyst holds significant value for recovery. This study focuses on the existing forms of rhodium (Rh) in waste catalysts and the current status of traditional processes. A green, efficient, and continuous recovery technique was developed using a sealed stainless steel microchannel reactor. The influence of reaction temperature, reaction time, and phase ratio on the Rh recovery rate was investigated, and the process parameters were optimized using response surface methodology (RSM). The results indicate that the magnitude of the impact on the Rh recovery rate follows the order: reaction temperature > reaction time > phase ratio. The optimized process parameters were determined as follows: a reaction time of 29 min, a reaction temperature of 110 °C, and a phase ratio of 1:1, with a corresponding maximum recovery rate of Rh of 66.06%. Furthermore, secondary treatment was performed on the organic phase after primary recovery using the same process conditions, resulting in an overall Rh recovery rate of 95.6%, indicating satisfactory recovery efficiency. Moreover, the application of FTIR and ICP-OES analysis provided definitive evidence that the oxidative dissociation of the rhodium-phosphine chemical bond by H2O2 within ROPAC leads to the conversion of Rh+ into Rh3+. Subsequently, Rh forms chloroaquorhodium (III) complexes that enter the aqueous phase, enabling effective recovery of Rh.

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“…Mo is a typical refractory metal with a melting point of 2,623 o C and a density of 10.28 g/cm 3 . it is also chemically stable and has excellent thermal and electrical properties [7,8]. Therefore, Mo is deposited by physical vapor deposition (PVD) such as sputtering on the glass substrate to form barrier layers for metal wiring of displays or semiconductor devices [9].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Roh,

Park,

Moon

et al. 2021

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powDer prepareD by electroDe inDuction Melting gas atoMization Molybdenum (Mo) is used to form a barrier layer for metal wiring in displays or semiconductor devices. Recently, researches have been continuously attempted to fabricate Mo sputtering targets through additive manufacturing. in this study, spherical Mo powders with an average particle size of about 37 um were manufactured by electrode induction melting gas atomization. Subsequently, Mo layer with a thickness of 0.25 mm was formed by direct energy deposition in which the scan speed was set as a variable. According to the change of the scan speed, pores or cracks were found in the Mo deposition layer. Mo layer deposited with scan speed of 600 mm/min has the hardness value of 324 hv with a porosity of approximately 2%. We demonstrated that Mo layers with higher relative density and hardness can be formed with less effort through direct energy deposition compared to the conventional powder metallurgy.

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Synthesis and characterization of micro-spherical tungsten-molybdenum alloy particles using spray drying combined with microwave assisted calcination process

Cited by 18 publications

References 19 publications

Synthesis and Characterization of Nanoscale Tungsten Particles with Hollow Superstructure Using Spray Drying Combined with Calcination Process

Synthesis and Characterization of Nanoscale Tungsten Particles with Hollow Superstructure Using Spray Drying Combined with Calcination Process

A New Process for Efficient Recovery of Rhodium from Spent Carbonyl Rhodium Catalyst by Microreactor

Archives of Metallurgy and Materials

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