Combustion synthesis-derived tantalum powder for solid-electrolyte capacitors

Won, H.I.; Nersisyan, Hayk H.; Won, C.W.

doi:10.1016/j.jallcom.2008.11.140

Cited by 10 publications

(2 citation statements)

References 6 publications

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“…Tantalum is widely used in electrolytic capacitors, nuclear reactors, and medical implants due to its outstanding corrosion resistance, and excellent biocompatibility . Tantalum powder is normally produced from sodium reduction of potassium heptafluorotantalate, K 2 TaF 7 .…”

Section: Some Examples Of Metal Manufacturingmentioning

confidence: 99%

A Brief Review of Metallothermic Reduction Reactions for Materials Preparation

Xing

2018

Small Methods

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Metallothermic reduction reactions (MRRs) are displacement reactions that use reactive metals to reduce compounds so that metals, alloys, nonmetal elementary substances, and composites are produced, often in a scalable manner. In recent years, nonmetal materials, mainly silicon and carbon, particularly in their nanostructured forms obtained using an MRR with magnesium as the reductant, have started to attract much attention. However, reactions using other metals as the reductant have not been widely investigated yet. Furthermore, the reaction mechanisms and their controlling factors remain unclear, and much more effort is needed to advance this emerging field. Here, MRR preparation methods for metals, alloys, nanoporous silicon, nanoporous carbon, and composites are discussed as an introduction for new researchers in this field.

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Section: Some Examples Of Metal Manufacturingmentioning

confidence: 99%

A Brief Review of Metallothermic Reduction Reactions for Materials Preparation

Xing

2018

Small Methods

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“…Tantalum is one of the key rare metals that has an extremely high melting temperature of 3290 K. Due to the excellent elasticity and corrosion resistance, it has been actively used as an alloying element into a super-alloy applied in the military parts such as jet engine, missile, and so on [1][2][3]. Additionally, the dielectric properties of the anodic oxide have allowed for its application as a raw material in the production of capacitors in the electronic industry [4].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Tantalum Powder via the Magnesium Reduction of Tantalum Pentoxide

Hwang

Wang

Lee

2019

Metals

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The metallic tantalum powder was successfully synthesized via reduction of tantalum pentoxide (Ta2O5) with magnesium gas at 1073~1223 K for 10 h inside the chamber held under an argon atmosphere. The powder obtained after reduction shows the Ta–MgO mixed structure and that the MgO component was dissolved and removed fully via stirring in a water-based HCl solution. The particle size in the tantalum powder obtained after acid leaching was shown to be in a range of 50~300 nm, and the mean internal crystallite sizes measured by the Scherrer equation varied from 11.5 to 24.7 nm according to the increase in reduction temperatures. The temperature satisfactory for a maximal reduction effect was found to be 1173 K because the oxygen content was minimally saturated to about 1.3 wt %.

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