STP420

    Parameters Affecting Dielectric Materials for Space Applications

    Published: Jan 1967


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    Abstract

    The dielectric properties of inorganic materials above 600 F are extremely sensitive to minor amounts of surface contamination. The contamination can cause effects which appear as degradation of insulation resistance. Sources of this contamination include fingerprints, vacuum grease, machine oil, organic binders, vacuum pumping oils, and volatile elements from metals. Careful selection of materials and rigid adherence to cleanliness techniques are required to evaluate dielectric materials correctly at high temperatures in vacuum. Pressure, radiation, and time have a negligible effect on the properties of inorganic insulations in clean vacuum conditions.

    Keywords:

    dielectric strength, electrical properties, electrical insulation, insulation, space environment, vacuum, contamination, high temperature, radiation, cement


    Author Information:

    Long, W. G.
    Senior research engineer, Component Development Group, Atomics International, Canoga Park, Calif


    Paper ID: STP43801S

    Committee/Subcommittee: D09.07

    DOI: 10.1520/STP43801S


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