HIGH VOLTAGE INSULATOR HAVING A THICK FILM RESISTIVE COATING

A hollow cylindrical electrical high voltage insulator, suitably an aluminum oxide ceramic material, adapted for use in an electron discharge device includes a fused thick film resistive coating on its inner surface that is on the order of 0.002-inch in thickness and which has a resistivity in the r...

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Bibliographische Detailangaben
Hauptverfasser:	HARDING M,US, PAYNE J,US
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CABLES CONDUCTORS ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY INSULATORS RESISTORS SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES
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Beschreibung
Zusammenfassung:	A hollow cylindrical electrical high voltage insulator, suitably an aluminum oxide ceramic material, adapted for use in an electron discharge device includes a fused thick film resistive coating on its inner surface that is on the order of 0.002-inch in thickness and which has a resistivity in the range of 3 x 108 to 1013 ohms per square at an ambient temperature of 75 DEG F. In one embodiment the thick film resistive coating is a vanadium-pentoxide chrome-sesquioxide mixture. The coating permits dissipation of surface charges and prevents high energy electrons from penetrating through to the insulator surface.