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Alumina 99.5%

Alumina is generally available in two concentrations: 99.5% and 96%. This ceramic is the workhorse of the microwave integrated circuit (MIC) business. 96% alumina is primarily used in high-temperature co-fired circuits, while 99.5% alumina is primarily used in thin film networks.

The data came from CoorsTek.

Formula or Composition Al2O3
Dielectric Constant (Alumina 99.5%) 9.8
Dissipation Factor (a.k.a. loss tangent, or tanAlumina 99.5%) .0001
Temperature Coefficient of Alumina 99.5% ppm/°C
Bulk Resistivity >1E14 Alumina 99.5%-cm
Temperature Coefficient of Resistivity (TCR) ppm/°C
Mass Density 3.97 gr/cc
Specific Heat J/g/°C
Thermal Conductivity (k) 25.5 W/m°C
Temperature Coefficient of Expansion (TCE) 7.0
Melting Point 2072 °C
3762 °F

Author : Unknown Editor

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