Preparation of tantalum metal powder by magnesium gas reduction of tantalum pentoxide with different initial particle size

Hwang, Seon-Min; Park, Su‐Jin; Wang, Jei-Pil; Park, Yong‐Ho; Lee, Dongwon

doi:10.1016/j.ijrmhm.2021.105620

Cited by 7 publications

(5 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 3 and Figure 4 show the SEM and X-ray diffraction (XRD) results of the previous study, respectively [ 22 ]. After controlling the particle size of tantalum oxide (Ta 2 O 5 ) via heat treatment at 1573 K for 2 h, magnesium reduction was performed at 1173 K in an argon atmosphere for 20 h to prepare a Ta + MgO mixture.…”

Section: Resultsmentioning

confidence: 99%

“…The reduction was considered successful, based on the absence of magnesium oxide from the tantalum phase, as indicated by the XRD results of the reduced tantalum powder (see Figure 4 ). The oxygen and inductively coupled plasma (ICP) analyses of the prepared tantalum powder indicated oxygen and magnesium contents of 0.36 and 0.005 wt.%, respectively [ 22 ].…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the oxidation rates of all metals increased with the temperature of hexane solution, depending on their activation energies. The activation energy for the oxidation reaction of each metal was determined from the slope of the line obtained from the relationship between ln k and the reciprocal of the hexane solution temperature (1/K) [ 22 ].…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, in a recent study, we manufactured tantalum metal powder using tantalum oxide (Ta 2 O 5 ) as the raw material with reducing magnesium gas. Therefore, the tantalum powder for the carburizing reaction was prepared as per the method reported in our previous study [ 22 ].…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis of Tantalum Carbide Using Purified Hexane by Titanium Powder

et al. 2022

Self Cite

View full text Add to dashboard Cite

Hexane is a safe, efficient, and cost-effective alternative to other commercial hydrocarbons for gaseous carburization; however, commercial hexane is not sufficiently pure. Titanium powder can remove oxygen-containing impurities from commercial hexane; however, research on the use of titanium powder remains limited. We investigated the purification of hexane using titanium, copper, and aluminum powders and used the purified hexane for the gaseous carburization of tantalum. Ti exhibited lower activation energy for oxidation (1.55 kJ/mol) than Cu (91.09 kJ/mol) and Al (150.25 kJ/mol) and a significantly higher oxidation rate (0.0269 g/h) in hexane at room temperature than Cu (0.0018 g/h) and Al (0.0001 g/h). The carbon content in tantalum carburized using the purified hexane was comparable to that carburized using unpurified hexane (approximately 6.22%); however, its oxygen content was significantly lower (1.39%), which indicates that the produced tantalum carbide has a higher purity. X-ray diffraction results revealed that the oxidation products of tantalum, such as Ta2O, TaO2, Ta0.8O2, and Ta2O5, were absent in the sample carburized using the purified hexane. Therefore, Ti powder can effectively remove oxygen-containing impurities from commercial hexane and facilitate its use as an effective carburizing medium for the synthesis of high-purity tantalum carbide.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of Tantalum Carbide Using Purified Hexane by Titanium Powder

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…1 Thus, Ta is an important metal that is widely used in high-technology industries, such as superconductor, 2 aircraft, 3 and atomic energy industries. 4 In addition, Ta is frequently employed to manufacture electromagnetic components and military hardware, 5 and Ta powder is typically used to manufacture capacitors. 6 Ta also has excellent biocompatibility and does not cause inflammatory reactions in human cells.…”

Section: Introductionmentioning

confidence: 99%

Computational Assignment of Tantalum-related Strong Absorption Peaks in the Infrared Spectrum of Potassium Heptafluorotantalate

Li,

Guo,

Liu

et al. 2023

ACS Omega

View full text Add to dashboard Cite

Tantalum (Ta) is a valuable and rare metal that is extensively used in the production of implant materials and high-performance capacitors. However, a convenient and effective method for the separation of Ta from other compounds has yet to be developed. On the basis of first-principle density functional theory (DFT), we simulated the vibrational spectrum of potassium heptafluorotantalate (K2TaF7). By performing a dynamics analysis of vibrational modes, we assigned peaks in infrared (IR) absorption and Raman scattering spectra to their corresponding vibrations. We focused on the strong IR absorption peaks of Ta-related vibrational modes in K2TaF7 and concluded that three observed IR absorption peaks, at 285, 315, and 530 cm–1, are good candidates. Provided with high power radiation at these three frequencies (at about 8.55, 9.45, and 15.9 THz), the good efficiency of photon–phonon resonance absorption will facilitate Ta separation from a compound.

show abstract

Reduction behavior of hematite ore with different particle sizes in suspension roaster

Gao

et al. 2022

Advanced Powder Technology

View full text Add to dashboard Cite

Preparation of tantalum metal powder by magnesium gas reduction of tantalum pentoxide with different initial particle size

Cited by 7 publications

References 28 publications

Synthesis of Tantalum Carbide Using Purified Hexane by Titanium Powder

Synthesis of Tantalum Carbide Using Purified Hexane by Titanium Powder

Computational Assignment of Tantalum-related Strong Absorption Peaks in the Infrared Spectrum of Potassium Heptafluorotantalate

Reduction behavior of hematite ore with different particle sizes in suspension roaster

Contact Info

Product

Resources

About