Some fluorinated liquid dielectrics

The properties of some fluorinated liquids are reviewed. They have low dielectric constants and low power factors over wide frequency and temperature ranges. They also have high dielectric strengths. A range of boiling points is available to make possible high vapor densities at relatively low temperatures. Utilization of this in electrical applications is feasible with these compounds since they meet requirements of nonflammability, stability, and compatibility with metals and insulation which are not satisfied entirely by other materials. Low water absorption and high thermal stability are additional reasons for interest in these materials.