Products

Tungsten Powder

Tungsten is one of the heaviest element (with a density of 19.3MG/m3)。
Also it has the highest melting point (approximately 3,410℃) of all metals.
Tungsten is very stable element, which does not oxidize in air. It has outstanding corrosion resistance, thermal conductivity and electric conductivity.

Tungsten powder

Mark Particle Size（μm） Chemical Composition（％）
W N.V.R. Fe Mo O
W-H 0.45～0.59 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.80
W-1 0.60～0.99 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.60
W-2 1.00～1.49 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.30
W-3 1.50～1.99 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.15
W-4 2.00～3.99 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.10
W-5 4.00～7.99 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.10
W-6 8.0～16.0 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.10

SEM image

Features
The characterictic of  this product is that it has a purity of 99.9 percent tungsten with high density, a high melting point and high conductivity.

Application
Cemented carbide tools, medical equipment and radiation sheilding.

Uniform particle type tungsten powder

Mark Particle Size（μm） Chemical Composition（％）
W N.V.R. Fe Mo O
W-1K 0.60～0.99 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.60
W-2K 1.00～1.49 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.30
W-3K 1.50～1.99 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.15
W-4K 2.00～3.99 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.10

SEM image

Features
Uniform particle type tungsten powder has extremely narrow particle size distribution in comparison to a conventional type with same FSSS particle.

Application
Metallization for Semiconductor.

Single particle type tungsten powder

Mark Particle Size（μm） Chemical Composition（％）
W N.V.R. Fe Mo O
W-1KD 0.60～0.99 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.80
W-2KD 1.00～1.49 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.30
W-3KD 1.50～1.99 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.20
W-4KD 2.00～3.99 ≧99.9 ≦0.010 ≦0.015 ≦0.010 ≦0.15

SEM image

Features
Single particle type tungsten powder is composed of only primary particles with very few secondary ones.
In paticular, the powders with about 1.0 - 3.0um particle, its particle size distribution is remarkably narrow.

Application
Metalization, particle dispersed composites and high-density components.

Coarse Tungsten Powder

Mark Particle Size（μm） Chemical Composition（％）
W N.V.R. Fe Mo O
W-L 10.0～40.0 ≧99.8 ≦0.020 ≦0.100 ≦0.050 ≦0.10
W-S -150 ≧99.8 ≦0.020 ≦0.100 - ≦0.05

SEM image

Remarks

  • （*1）Particle size : Sub Sieve Sizer
              Screening mesh size is adopted to W-S.
  • （*2）Tungsten purity (W percentage) : 100 - (Fe%+Mo%+N.V.R.%)
  • （*3）N.V.R. : Non volatil Residue, treated by Hydrogen chloride 780℃ (JIS H01402)
  • （*4）O : by Oxidation Infrated Absorption Method (JIS H-1402)
  • （*5）Tungsten powder is a restricted item by Japan's export control regulation.
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