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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.
Element	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.
Element	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.
Element	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
Parameter	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
Parameter	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
Parameter	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
Parameter	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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