Tantalum powders

EB melted capacitor powder: 1, 2а, 2б, 3, 4б, 5а, 5б
Tantalum powder for high-voltage capacitor ВВ-1, ВВ-2, ВВ-3
Tantalum powder of fine grain size ТаПM
Agglomerated Tantalum powder ТаПА, ТаПБ

Chemical composition, %

Grade
Ta
Ti
 W
Mo
O
N
Na
Al
Cr
Co
Cu
1, 2а, 2б, 3, 4а, 4б
5а
5б
ВВ-1, ВВ-2, ВВ-3
ТаПА, ТаПБ
ТаПМ
осталь-
ное
0.0008
0.0008
0.0008
0.0008
0.0008
0.01
0.01
0.003
0.003
0.003
0.003
0.02
0.01
0.001
0.001
0.001
0.001
0.01
0.15
0.25
0.3
0.15
0.35
0.9
0.012
0.012
0.012
0.012
0.012
0.01
0.0003
0.0003
0.0003
0.0003
0.0003
0.0005
0.0008
0.0003
0.0003
0.0005
0.0003
0.01
0.0008
0.0005
0.0005
0.0005
0.0005
0.008
0.0001
0.0001
0.0001
0.0001
0.0001
0.0005
0.002
0.001
0.001
0.001
0.001
0.01
Grade
Nb
Fe
Si
C
H
Mg
Ca
Mn
Ni
Zr
Sn
1, 2а, 2б, 3, 4а, 4б
5а
5б
ВВ1, ВВ2, ВВ3
ТаПА, ТаПБ
ТаПМ
0.05
0.1
0.1
0.05
0.05
0.2
0.005
0.002
0.002
0.002
0.003
0.05
0.003
0.0015
0.0015
0.001
0.0015
0.02
0.01
0.007
0.007
0.003
0.007
0.05
0.01
0.01
0.01
0.01
0.01
0.05
0.0003
0.0003
0.0003
0.0003
0.0003
0.01
0.0015
0.002
0.002
0.0015
0.002
0.02
0.0003
0.0003
0.0003
0.0003
0.0003
0.005
0.0005
0.0005
0.0005
0.0005
0.0005
0.01
0.0005
0.0005
0.0005
0.0005
0.0005
0.001
0.0005
0.0002
0.0002
0.0003
0.0003
0.0005

Powder characteristics

Property/Grade
1
2a
2b
3
4a
4b
5a
5b
ВВ1
ВВ2
ВВ3
ТаПМ
Grain size, mm
40-63
5-63
5-63
5-40
20-63
20-63
3-30
3-30
40-63
20-63
5-63
<5.0
Sieve remainder 0063(+)
004 (+)
004 (-)
10
-
10
10
-
-
5
-
-
-
10
-
1.5
-
-
1.5
-
-
-
-
-
-
-
-
10
-
10
2.0
-
-
5.0
-
-
-
-
-
Specific surface, cm / 2 g
70-
140
240-
330
280-
410
390-
560
130-
160
150-
180
600-
800
700-
1000
actual
-
-
2000-
3000
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-
7.0
3.0-
4.0
Specific charge, mC/g
-
-
-
-
-
-
4000-
4900
4900-
5600
600-
1000
1100-
1500
1800-
2200
3700
+(700)
Specific сapacitance, CV/g
7-10
14-16
17-20
19-22
10-12
12-14
-
-
-
-
-
-
DCL, mA/mC - 10-3
-
-
-
-
-
-
<2.0
<2.0
<1.0
<1.0
<1.0
-
Average leakage current, mA
<2.0
<3.0
<3.0
<3.0
<3.0
<3.0
-
-
-
-
-
-
Dissipation factor, tan d, %
<2.0
<3.0
<3.0
<3.0
<2.0
<2.0
<2.0
<2.0
<4.0
<5.0
<7.0
-

Metallurgical grade Tantalum powder

Grade
Ta
Nb
N
O
C
Fe
Si
Ti
Na
S
P
Ca
A
99.0
0.1
0.5
0.5
-
0.07
0.05
-
0.07
0.01
0.01
0.05
Б
99.5
0.05
0.2
0.3
-
0.01
0.01
-
0.02
0.005
0.005
0.002
В
98.6
0.1
0,5
0,5
0.2
0.07
0.05
0.02
0.02
-
-
-

Tantalum powders properties and groups

Table 1 Mass fraction of verifiable impurities

Element

Powder group and mass fraction of impurities, ppm, max.

3.5 kCV

4.4 kCV

Up to 8 kCV

Nb

40

40

50

Fe

20

20

35

Si

8

8

15

Ca

3

3

10

Ti

1

1

5

Al

-

-

-

W

5

5

5

Mo

3

3

5

Mn

1

1

5

Mg

10

10

25

Ni

3

3

5

Cr

5

5

5

Cu

3

3

7

K

2

2

5

Na

2

2

5

P

-

-

-

Table 2 Mass fraction of verifiable impurities

Element

Powder group and mass fraction of impurities, ppm, max.

30 kCV

40 kCV

50 kCV

Nb

40

40

40

Fe

20

20

20

Si

20

20

20

Ca

5

5

5

Ti

3

3

3

Al

5

5

5

W

5

5

5

Mo

3

3

3

Mn

3

3

3

Mg

18

20

20

Ni

5

10

10

Cr

10

10

10

Cu

3

3

3

K

25

25

25

Na

10

10

10

P

110

150

150

Table 3 Mass fraction of verifiable impurities

Element

Powder group and mass fraction of impurities, ppm, max.

3.5 kCV

4.4 kCV

Up to 8 kCV

C

20

20

80

O

1300

1500

1700

N

50

50

100

H

50

50

100

Table 4 Mass fraction of verifiable impurities

Element

Powder group and mass fraction of impurities, ppm, max.

 

30 kCV

40 kCV

50 kCV

C

35

35

35

O

2000

2600

3400

N

200

200

300

H

90

130

170

Table 5 Physical properties

Parameter

Powder group

3.5 kCV

4.4 kCV

Up to 8 kCV

Anode crushing strength, N (kgf), min.

39.2 (4)

19.8 (2)

-

Bulk density, g/cm3

3.35 to 3.96

3.05 to 3.65

3.5 to 5.6

Mean particle size according to Fisher SSS, µm

6.0 to 12.0

-

4.0 to 9.0

Max. fines content, %:
+250µm
-250+45µm
-45µm

-

-

10
balance
70

Table 6 Physical properties

Parameter

Powder group

30 kCV

40 kCV

50 kCV

Anode crushing strength,
N (kgf), min.

58.9 (6)

Bulk density, g/cm3

1.4 to 1.95

1.4 to 2.0

1.4 to 2.1

Table 7 – Electrical properties

Parameter

Powder group

3.5 kCV

4.4 kCV

Up to 8 kCV

Specific charge, µC/g

3400 to 4600

3770 to 4880

 6500 to 8000

DC leakage current, µA/g, max. (to be measured at the second minute)

0.5

0.55

1

Specific charge, µC/g

2570 to 3500

 3370 to 4380

-

DC leakage current, µA/g, max. (to be measured at the second minute)

1.4

0.88

-

Table 7 – Electrical properties - Continued

Parameter

Powder group

30 kCV

40 kCV

50 kCV

Specific charge, µC/g

19800 to 22000

35000
to 38000

56800
to 61200

Min. breakdown voltage, V

110

90

80

DC leakage current, µA/g, max. (to be measured at the third minute)

3.5

9

20

Specific charge, µC/g

24000 to 26000

36000
to 40000

60500
to 65500

DC leakage current, µA/g, max. (to be measured at the third minute)

5,0

12

25

Min. breakdown voltage, V

100

80

75

Particle size, specific surface area, and dissipation factor for these powders – according to the contract and the customer’s specification

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04-01-2017