Tantalum powder

Characteristics

Powder of tantalum is a finely dispersed mass produced mechanically or chemically. Such powder is relevant in jewelry, electrical engineering (for creation of power-consuming capacitors), in nuclear power engineering — for fuel element cladding. In metallurgy tantalum powder is in demand as an alloying agent for heat-resistant alloys.

Manufacturing

Powdered tantalum is based on tantalum production waste — tin TH-3 which is treated with pure hydrogen in hermetic furnaces. Compact tantalum is loosened and oxides are removed from its surface. Then the powder is blasted on a special table, where electrolyte residues are separated and mechanical impurities are washed off. After that the powder mass is washed with water and dried. By another method, tantalum powder can be obtained by electrolysis of a salt melt consisting of Ta2 O5 and K2 TaF7 (potassium fluorotantalate), potassium fluoride and potassium chloride.

Properties

Depending on the dispersion, tantalum powder comes in different colors. The darkest is black, but most fractions are lighter and even bluish-steel in color. Pure tantalum powder is very plastic. It is characterized by resistance to moisture, industrial condensate, and concentrated acids. When heated in a stream of hydrogen, it converts to black hydride. Before pressing, tantalum powder is wetted with a solution of glycerine or alcohol. During sintering, these solutions evaporate without residue.

Percentage composition of tantalum powder

Grade Ti Mo N Al Co W O Na Cr Cu Ta
1, 2a, 2b, 3, 4a, 4b 0.0008 0.01 0.012 0.0008 0.0001 0.01 0.15 0.0003 0.0008 0.002 Basis
5а 0.0008 0.001 0.012 0.0003 0.0001 0.003 0.25 0.0003 0.0005 0.001  
5б 0.0008 0.001 0.012 0.0003 0.0001 0.003 0.3 0.0003 0.0005 0.001  
VV-1, VV-2, VV-3 0.0008 0.001 0.012 0.0005 0.0001 0.003 0.15 0.0003 0.0005 0.001  
TAPA, TAPB 0.0008 0.001 0.012 0.0003 0.0001 0.003 0.35 0.0003 0.0005 0.001  
TAPM 0.01 0.01 0.01 0.01 0.0005 0.02 0.9 0.0005 0.008 0.01  
Class Fe C Mg Mn Zr Nb Si H Ca Ni Sn
1, 2a, 2b, 3, 4a, 4b 0.005 0.01 0.0003 0.0003 0.0005 0.05 0.003 0.01 0.0015 0.0005 0.0005
5а 0.002 0.007 0.0003 0.0003 0.0005 0.1 0.0015 0.01 0.002 0.0005 0.0002
5б 0.002 0.007 0.0003 0.0003 0.0005 0.1 0.0015 0.01 0.002 0.0005 0.0002
BB1, BB2, BB3 0.002 0.003 0.0003 0.0003 0.0005 0.05 0.001 0.01 0.0015 0.0005 0.0003
TAPA, TAPB 0.003 0.007 0.0003 0.0003 0.0005 0.05 0.0015 0.01 0.002 0.0005 0.0003
TAPM 0.05 0.05 0.01 0.005 0.001 0.2 0.02 0.05 0.02 0.01 0.0005

Characteristics of tantalum powder

Properties/Grade 1 2a 2b 3 4a 4b 5a 5b BB1 BB2 BB3 TAPM
Residual 0063 (+)004 (+)004 (-) 10−10 10-- 5-- -10- 1.5-- 1.5-- --- --- 10−10 2-- 5-- ---
Coarseness, microns 40−63 5−63 5−63 5−40 20−63 20−63 3−30 3−30 40−63 20−63 5−63 <5.0
Specific surface area, cm2/g 70−140 240−330 280−410 390−560 130−160 150−180 600−800 700−1000 - - - 2000−3000
Specific charge, μCl/g - - - - - - 4000−4900 4900−5600 600−1000 1100−1500 1800−2200 3700+(700)
Bulk density, g/cm3 7−8 6.8−7.3 6.3−7.0 5.9−6.4 7.5−7.8 7.2−7.6 4.8−5.3 4.6−5.0 7−8 7,2−7,6 6.3−7 3.0−4.0
Specific capacity, μF/g 7−10 14−16 17−20 19−22 10−12 12−14 - - - - - -
Average current, μA <2 <3 <3 <3 <3 <3 - - - - - -
Specific current flow, μA/μLx10−3 - - - - - - <2 <2 <1 <1 <1 -

Supply

We supply certified tantalum powder at optimum price. The technical documentation includes data on the percentage composition and impurity limits. From us you can order in bulk any product for large-scale production. We also provide the best conditions for retail buyers. The high level of service and responsiveness of service is the face of our company.

Buy at a bargain price

All metal powders sold by Evek GmbH comply with GOST and international quality standards. All deliveries are made in the shortest possible time. High quality, reasonable prices and wide range of products determine the face of our company. Becoming our regular client you can count on the system of discount discounts. Cooperation with us will help you realize any engineering plans. We are waiting for your orders on our site.