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Alumina Electronic Insulators

alumina tubes

Typical Applications

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high voltage electronic vacuum switch

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X-ray tube

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thyratrons

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electron beam emitter

Typical Material Properties

volume density

≥3.6 g/cm3

breakdown voltage

>15 kV/mm

dielectric constant

at 1 MHz and 20C

9 ~ 10

dielectric loss tangent

at 1 MHz and 20C

<3.5 E-4
volume resistivity >E13 Ωcm
coefficient of thermal expansion 6.5 E-6 ~ 8 E-6 mm/C
bending strength ≥275 MPa