Capacitor Grade Tantalum Powder Description
SAM offers high-quality capacitor grade tantalum powder (4V-40V) produced using sodium reduction processes. Tantalum has twice the density of steel and it is highly ductile. It has the fourth-highest melting point of all metals and is able to form extremely thin and protective oxide layers for high-quality capacitors. Our powder also has a high surface area and great handling and flow properties.
.JPG "capacitor grade ta powder (4-40)")
Capacitor Grade Tantalum Powder Specification
|
Product No.
|
Chemical Compositions (ppm)
|
Physical Properties
|
Electrical Properties
|
|
Impurities ≤
|
SBD
(g/cc)
|
Fsss
(μm)
|
Capacitance
(μFV/g)
|
Dc Leakage
(μA/μFV)
|
|
O
|
N
|
|
TaA001
|
1800
|
100
|
1.9-2.5
|
4.5-7.5
|
6000+10 -5%
|
＜2.0×10-4
|
|
TaA002
|
2200
|
120
|
1.8-2.3
|
4.5-6.5
|
8000+10 -5%
|
＜2.0×10-4
|
|
TaA003
|
2400
|
150
|
1.7-2.1
|
2.5-4.5
|
15000+10 -5%
|
＜2.2×10-4
|
|
TaA004
|
1800
|
150
|
1.6-2.0
|
2.4-3.5
|
23000+10 -5%
|
＜2.2×10-4
|
|
TaA005
|
2300
|
400
|
1.7-2.1
|
2.4-3.5
|
32000+10 -5%
|
＜2.5×10-4
|
|
TaA006
|
2500
|
400
|
1.6-2.0
|
2.0-3.5
|
40000+10 -5%
|
＜2.5×10-4
|
|
TaA007
|
3200
|
400
|
1.6-2.0
|
2.0-3.4
|
50000+10 -5%
|
＜2.5×10-4
|
|
TaA008
|
3600
|
600
|
1.5-1.9
|
1.8-3.0
|
70000+10 -5%
|
＜2.8×10-4
|
|
TaA009
|
5000
|
1500
|
1.5-1.9
|
1.4-2.8
|
80000+10 -5%
|
＜3.1×10-4
|
|
TaA010
|
6000
|
1500
|
1.4-2.3
|
1.2-2.6
|
100000+5 -5%
|
＜3.5×10-4
|
|
TaA011
|
7500
|
1800
|
1.7-1.9
|
0.8-2.2
|
120000+5 -5%
|
＜3.5×10-4
|
|
TaA012
|
8500
|
2500
|
1.4-2.0
|
1.1-2.3
|
150000+5 -5%
|
＜3.5×10-4
|
|
TaA013
|
9500
|
2700
|
1.68-1.98
|
1.6-2.8
|
170000+5 -5%
|
＜4.0×10-4
|
|
TaA014
|
11500
|
3000
|
1.6-2.1
|
1.0-2.6
|
200000+5 -5%
|
＜4.5×10-4
|
Capacitor Grade Tantalum Powder Properties
Capacitor-grade tantalum powder is a high-purity material used specifically in the production of tantalum capacitors.
• High Purity: The powder has extremely high purity, typically greater than 99.95%, to ensure reliable performance in capacitors.
• Particle Size and Shape: The powder particles are fine and have a specific size distribution, often in the range of 1 to 10 micrometers, with a uniform spherical or angular shape for optimal packing and performance.
• High Surface Area: A large surface area to volume ratio is essential for high capacitance values, which is achieved by having small and uniformly shaped particles.
• High Capacitance Efficiency: The material's intrinsic properties enable high capacitance per unit volume, making it suitable for compact and efficient capacitor designs.
• Low Leakage Current: The high purity and controlled particle size help in reducing the leakage current, ensuring better performance and reliability of the capacitors.
• Good Sintering Properties: Tantalum powder used for capacitors must sinter well to form a dense, stable anode structure during the manufacturing process.
• Consistent Performance: The powder is manufactured to provide consistent electrical performance, ensuring that capacitors have reliable and predictable characteristics.
These properties make capacitor-grade tantalum powder an ideal material for producing high-performance, reliable tantalum capacitors used in various electronic applications.
Capacitor Grade Tantalum Powder Application
• Used in laboratory equipment.
• Used as a substitute for platinum.
• Used in manufacturing superalloys and electron-beam melting.
• Used in metallurgical, machinery processing, glass, and ceramic industries.
• Used as a superalloy additive in nickel-based alloys.
• Used for sputtering targets.
Capacitor-Grade Tantalum Powder Manufacturing Processes
Capacitor-grade tantalum powder is classified into three series based on the working voltage and capacitance of the resulting capacitors: low-voltage high-specific-capacitance, medium-voltage medium-specific-capacitance, and high-voltage low-specific-capacitance.
Industrially, high-voltage capacitor-grade tantalum powder is produced via the hydrogenation process. Sodium thermal reduction is used to manufacture medium- and low-voltage capacitor-grade tantalum powder, while carbothermal reduction is employed to produce cost-effective medium- and high-voltage capacitor-grade tantalum powder, as well as metallurgical-grade tantalum powder.
Tantalum powder obtained through all three methods undergoes a series of post-processing steps, including crushing, acid washing, classification, particle size blending, vacuum heat treatment, and product formulation. Finally, it must pass comprehensive performance testing against various specifications.
Capacitor Grade Tantalum Powder Packaging
Our Tantalum powder is carefully handled to prevent damage during storage and transportation.
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