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Thermal Expansion of Metals and Insulators |
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This Graph illustrates the differential expansion between several
commonly used vacuum grade metals and crystalline materials. The
curves for Nickel-Iron KovarŪ and Sapphire clearly indicate their
compatibility in the fabrication of Ceramic-to-Metal seals at
temperatures below 650°C.
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| INTENDED OPERATING CONDITIONS Electrical ratings are determined by various factors, including dielectric strength, geometry and system operating pressure. Please note that all ISI catalog products are electrically rated for operation with one side in dry atmospheric conditions and the other side in a vacuum environment with a maximum system pressure of 1 x 10-4 Torr. We advise that users make allowances for deviations from stated operating parameters and take adequate safety precautions when feedthroughs are operated at high voltages or high currents. |
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