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| Progress of production and purification technology of tantalum powder |
| SU Longxing1，YAN Xiaoyong2 |
| 1School of Physical Science and Technology，Shanghai Tech University，Shanghai 201210，China；
2Aoyong Material Limited Corporation，Shanghai 200082，China |
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Abstract Different industrial methods of preparing tantalum powder were systematically introduced. These techniques，
including sodium reduction of potassium fluo tantalate，sodium/magnesium reduction of tantalum oxide，
electrical deoxidation of tantalum oxide and so forth，were developed during past decades. Advantages and disadvantages
were compared and analyzed in respect of production efficiency and reaction mechanism to select the
most optimal method. Subsequently，purification techniques for preparing tantalum powder were introduced. The
progresses of acid leaching，deionized water washing and oxygen removing were described in details. Finally，metallic
elements of Fe，Cu，Ni，Cd and nonmetallic elements of C，O，Si were discussed in deep to evaluate the
current purification techniques.
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Received: 25 May 2019
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2021, Vol. 31 
