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Content

Photos 1 I. Basic Physical Properties (Conventional Industrial Grade 95%–99.7% Al₂O₃) 2 II. Electrical Performance 3 III. Thermal Properties 4 IV. Chemical Properties 5 VI. Typical Applications Customers who bought this product also bought

Alumina Ceramics（Al₂O₃）

I. Basic Physical Properties (Conventional Industrial Grade 95%–99.7% Al₂O₃)

project Parameter range
Main ingredientsAl₂O₃ ( 9 5%–99.7% )
colorIvory white​
density3.6 – 3.9 g/cm³
Water absorption rate0%
Porosity≤ 0.2%
Mohs hardness8 – 9
flexural strength200 – 400 MPa
compressive strength1500 – 3000 MPa

II. Electrical Performance

project parameter
Volume resistivity≥ 10¹³ – 10¹⁵ Ω·cm
Dielectric strength15 – 25 kV/mm
Dielectric constant ( εr )9 – 10 ( @1MHz )
Dielectric loss ( tanδ )≤ 0.0001 – 0.0005
Insulation performanceExcellent (remains stable even at high temperatures)

III. Thermal Properties

project parameter
thermal conductivity20 – 35 W/m·K
Operating temperature1200 – 1600 ℃
Melting point≈ 2050 ℃
coefficient of thermal expansion(6.5 – 8.0) ×10⁻⁶ /℃
thermal shock performanceGood (high-density structure)

IV. Chemical Properties

  • It has strong resistance to acids and alkalis (except for HF hydrofluoric acid) .
  • Extremely strong antioxidant capacity
  • Corrosion resistant and aging resistant
  • Long-term stability without deformation

VI. Typical Applications

electrical industry

  • High voltage insulation components
  • Fuse tube
  • Heating element support

Electronics industry

  • IC packaging substrate
  • RF radio frequency components
  • microwave communication devices

Industrial equipment

  • Wear-resistant ceramic parts
  • High temperature support components
  • Precision guide components

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