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Thermal Functional Filler

  • Alumina / hBN
  • Showa Denko K.K. has a various unique Thermal Functional Filler.
  • We have a full line-up of Al2O3 products.
  • Alumina (Fine Particle）
  • AS (The shape of roundness)
  • CB (Spherical)
  • UHP (Fine Particle & Granule）

Thermal Conductivity of Inorganics

  • Heat dissipation material (sheet, grease, etc.)
  • Metal base / MC substrate (insullating layers)
  • EMC

AS - Roundish Alumina

  • Feature - SEM Images

Representative characteristics of AS

  •   AS-10 AS-20 AS-30 AS-40 AS-50
    0 - 1100℃weight loss % 0.05 0.07 0.09 0.13 0.18
    SiO2 % 0.05 0.06 0.06 0.06 0.06
    Fe203 % 0.04 0.06 0.07 0.06 0.05
    Na20 % 0.03 0.03 0.03 0.04 0.03
    Na+ ppm 3 3 3 50 3
    Cl- ppm 1 1 1 2 1
    D50 µm 39 22 18 12 9
    Oil absorption ml/100g 11 9 9 7 9
    BET Specific surface area m²/g 0.5 0.8 1 1.2 1.9
    Electric conductivity µS/cm 3 4 5 31 11
    pH - 5.7 5.5 5.4 7.4 5.4
    121℃ X 20hr extraction with hot water
    pH - 6.4 6.2 6 7.7 5.8
    Na+ ppm 2 5 5 60 6
    Electric conductivity µS/cm 10 10 12 28 16

Particle size distribution

  • Microtrac HRA

Compound viscosity

Thermal Conductivity

CB - Spherical Alumina

  • Feature - SEM Images
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