For some high-frequency circuitry applications, the Dielectric Constant and other electrical properties are important and the list below gives a general level of guidelines. More specific information is available from the manufacturer of the material.

Electrical resistivity: >1018 Ω·m
Dielectric constant: 3.75 at 20°C 1 MHz
less than 0.0004 at 20 °C 1 MHz
Index of refraction: at 587.6 nm (nd): 1.4585, change of refraction index with temperature change (0 to 700°C): 1.28×10−5/°C (between 20 and 30°C)
Dielectric strenght: 250–400 kV/cm at 20°C

Additional information on our quartz wafers:

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