Heat Treatment of Tantalum and Niobium Powders Prepared by Magnesium-Thermic Reduction

Орлов, В. М.; Prokhorova, T. Yu.

doi:10.1134/s003602951711009x

Cited by 3 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The particle size of niobium powder is relatively small, which is conducive to the compactness of powder metallurgy products. However, the niobium powder with small particle size has high affinity with oxygen and can adsorb oxygen, resulting in high oxygen content of the niobium powder 1 – 5 . Excessive oxygen content in niobium powder significantly affects its physical, mechanical, and electrical properties, restricting the application of niobium and niobium alloys 6 – 10 .…”

Section: Introductionmentioning

confidence: 99%

Effect of magnesium reduction on the oxygen content of pickling niobium powder

Wang

Zhang²,

Liu

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Considering the problem of high oxygen content in industrial niobium powder, the oxygen reduction of high oxygen niobium powder with the addition of magnesium is studied. Based on the thermodynamic analysis of magnesium thermal reduction of niobium powder, the effects of reduction temperature, magnesium addition, reduction time, and reduction atmosphere on the oxygen content of pickling niobium powder are studied. The results show that with an increase in the magnesium addition, the oxygen content of pickling niobium powder gradually decreases to a certain value, and then remains unchanged. In a certain temperature range (953–1203 K), with an increase in the reduction temperature, the oxygen content of pickling niobium powder first decreases, and then increases; the best oxygen content is 356 ppm at 1133 K. With the extension in reduction time (2–6 h), the oxygen content of pickling niobium powder first decreases, and then remains unchanged. Finally, the oxygen content of pickled niobium powder is reduced to approximately 356 ppm at 400% magnesium addition at 1133 K for 4 h.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of magnesium reduction on the oxygen content of pickling niobium powder

Wang

Zhang²,

Liu

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Большая удельная поверхность приводит к повышенному содержанию кислорода в спеченных анодах и ухудшению их параметров. Модификацию характеристик первичных порошков для уменьшения поверхности и улучшения текучести осуществляли тремя путями: 1) термообработкой предварительно гранулированного порошка в вакууме с последующим раскислением (ТПГП); 2) раскислением порошка без предварительной термообработки (РП); 3) термообработкой реакционной массы (ТРМ) [12]. Принципиальная технологическая схема получения магниетермического конденсаторного порошка этими тремя способами представлена на рис.…”

Section: магниетермические конденсаторные порошкиunclassified

DEVELOPMENTS OF ICT KSC RAS IN THE FIELD OF TECHNOLOGY OF TANTALUM CAPACITOR POWDERS WITH A SPECIFIC CHARGE FROM 3 000 TO 120 000 C/g

Орлов¹,

Колосов²,

Prokhorova³

et al. 2023

TKSC RAS

View full text Add to dashboard Cite

The results of research in the field of obtaining tantalum capacitor powders in ICT KSC RAS are presented. The basic technological schemes and original solutions of individual operations included in them for obtaining agglomerated electron-beam (EB) powders with a specific charge 3 000–6 500 C/g, sodium-thermal powders with a specific charge 8 000–70 000 C/g, and magnesium-thermal tantalum powders (specific charge 80 000–120 000 C/g) are considered.

show abstract