Alumina-ceramic-based electrical insulator, method for producing the insulator, and vacuum tube comprising the insulator
AssigneeThales
InventorsPascal Ponard, Christophe Bourat
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Abstract
An alumina-ceramic-based electrical insulator, to a method for producing the insulator, and to a vacuum tube includes the insulator. The electrical insulator is for insulating two electrodes of a vacuum tube through which a charged particle beam flows, the electrical insulator being formed of an alumina-based ceramic. The ceramic comprises a vitreous phase of between 2% and 8% by weight into which at least one metal oxide is diffused from a face of the electrical insulator.
Claims14
An electrical insulator for insulating at least one electrode of a vacuum tube through which a charged particle beam flows, the electrical insulator being formed of an alumina-based ceramic, wherein the ceramic is formed of a polycrystalline material having boundaries, between the boundaries of which a vitreous phase of between 2% and 8% by weight is present and into which at least one metal oxide is diffused from a face of the electrical insulator, the metal oxide concentration decreasing gradually with distance from the face.
Dependencies are inferred from the claim text.