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Some insulating structures of Mo/Al2O3 cermet - Al2O3 ceramic - Mo/Al2O3 cermet were prepared to improve surface flashover performance in vacuum through co-firing, where the volume amount of Mo was managed from 2 to 50 vol% and there could exist one or two layers with different Mo amount in Mo/Al2O3 cermet. The influences of Mo amount of Mo/Al2O3 cermet on the surface flashover voltage in vacuum of...
In this paper, ZnO varistor+Al2O3 ceramic+ZnO varistor insulators were made, in which the conductivity and permittivity of ZnO varistors were controlled by changing its voltage gradient. Then the influences of conductivity and permittivity of ZnO varistors on the DC and pulsed surface flashover voltage in vacuum were experimentally investigated. The experimental results indicated that the DC and pulsed...
Research on the vacuum surface flashover mechanisms of insulating material under nanosecond pulses is important for the design and manufacture of high-power pulse generators. Here, the vacuum surface flashover characteristic of epoxy composites filled with different microfillers Al2O3 middot3H2O , Al2O3, BaTiO3, and TiO2 is investigated using a unipolar pulse generator (50-ns rise time and 600-ns...
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