INDIRECT HEATING CATHODE HEATING ELEMENT, METHOD OF MANUFACTURING THE SAME, AND INDIRECT HEATING CATHODE COMPRISING SUCH A MEMBER

摘要

P THIS INVENTION CONCERNS A HEATING ELEMENT FOR AN INDIRECT HEATING CATHODE. / P P THIS HEATING ELEMENT IS CONSISTING OF A FILAMENT 3 AND A MIX 4, SINK BETWEEN 1700 AND 1800C, OF ALUMINA AND LESS THAN 10 BY WEIGHT OF YTTRIUM OXIDE. THIS MIXTURE FILLS THE SPACE LEFT FREE BY THE FILAMENT INSIDE THE CYLINDER 2 BLOCKED BY AN EMISSIVE DISK 1 WHICH CONSTITUTES THE CATHODE. / P P APPLICATION TO INDIRECT HEATING CATHODES AND FILAMENT DIT POTTE. / P