Tantalum powder preparation from ta2O5by calciothermic reduction

Jung Woo Ha; Ho Sang Sohn; Jae Young Jung

doi:10.3365/KJMM.2012.50.11.823

Tantalum powder preparation from ta₂O₅by calciothermic reduction

Jung Woo Ha, Ho Sang Sohn, Jae Young Jung

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Abstract

Direct reduction of Ta₂O₅ using liquid calcium was investigated. The experiment was conducted in a closed stainless steel chamber in an Ar atmosphere for 5-120 minutes. Most of Ta₂O₅ was reduced to α -Ta in 30 minutes above 1173 K and at a molar ratio of Ca and Ta₂O₅ above 10. The particles size increased with the reaction temperature, but it did not change much above 1223 K. The oxygen content of metal Ta was about l wt%.

Original language	English
Pages (from-to)	823-828
Number of pages	6
Journal	Journal of Korean Institute of Metals and Materials
Volume	50
Issue number	11
DOIs	https://doi.org/10.3365/KJMM.2012.50.11.823
State	Published - Nov 2012

Keywords

Calciothermic
Calcium
Direct reduction
Tao
Tantalum

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10.3365/KJMM.2012.50.11.823

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abstract = "Direct reduction of Ta2O5 using liquid calcium was investigated. The experiment was conducted in a closed stainless steel chamber in an Ar atmosphere for 5-120 minutes. Most of Ta2O5 was reduced to α -Ta in 30 minutes above 1173 K and at a molar ratio of Ca and Ta2O5 above 10. The particles size increased with the reaction temperature, but it did not change much above 1223 K. The oxygen content of metal Ta was about l wt%.",

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AU - Ha, Jung Woo

AU - Sohn, Ho Sang

AU - Jung, Jae Young

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N2 - Direct reduction of Ta2O5 using liquid calcium was investigated. The experiment was conducted in a closed stainless steel chamber in an Ar atmosphere for 5-120 minutes. Most of Ta2O5 was reduced to α -Ta in 30 minutes above 1173 K and at a molar ratio of Ca and Ta2O5 above 10. The particles size increased with the reaction temperature, but it did not change much above 1223 K. The oxygen content of metal Ta was about l wt%.

AB - Direct reduction of Ta2O5 using liquid calcium was investigated. The experiment was conducted in a closed stainless steel chamber in an Ar atmosphere for 5-120 minutes. Most of Ta2O5 was reduced to α -Ta in 30 minutes above 1173 K and at a molar ratio of Ca and Ta2O5 above 10. The particles size increased with the reaction temperature, but it did not change much above 1223 K. The oxygen content of metal Ta was about l wt%.

KW - Calciothermic

KW - Calcium

KW - Direct reduction

KW - Tao

KW - Tantalum

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JO - Journal of Korean Institute of Metals and Materials

JF - Journal of Korean Institute of Metals and Materials

IS - 11

ER -

Tantalum powder preparation from ta₂O₅by calciothermic reduction

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Keywords

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