Heat Treatment of Tantalum and Niobium Powders Prepared by Magnesium-Thermic Reduction
- Authors: Orlov V.M.1, Prokhorova T.Y.1
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Affiliations:
- Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
- Issue: Vol 2017, No 11 (2017)
- Pages: 905-911
- Section: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/171808
- DOI: https://doi.org/10.1134/S003602951711009X
- ID: 171808
Cite item
Abstract
Changes in the specific surface area and porous structure of tantalum and niobium powders, which were prepared by magnesium-thermic reduction of Ta2O5, Mg4Ta2O9, and Mg4Nb2O9 oxide compounds and subjected to heat treatments at temperatures of 600–1500°C, have been studied. It is noted that, owing to the mesoporous structure of the magnesium-thermic powders, the decrease in the surface area during heat treatment, first of all, is related to a decrease in the amount of pores less than 10 nm in size. The heat treatment of a reacting mass is shown to allow us to correct the specific surface area of the powder without any increase in the oxygen content in it. Data on the effect of heat treatment conditions on the specific charge of capacitor anodes are reported.
About the authors
V. M. Orlov
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Email: tantal@chemy.kolasc.net.ru
Russian Federation, Apatity, Murmansk oblast, 184209
T. Yu. Prokhorova
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Author for correspondence.
Email: tantal@chemy.kolasc.net.ru
Russian Federation, Apatity, Murmansk oblast, 184209
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