Electric lamp or space discharge component or device manufacturi – Process – Electrode making
Patent
1997-03-25
1999-04-06
Ramsey, Kenneth J.
Electric lamp or space discharge component or device manufacturi
Process
Electrode making
H01J 904
Patent
active
058909419
ABSTRACT:
A method of manufacturing a dispenser cathode, in which method a powder of a refractory metal and a scandium-containing powder are mixed with each other and pressed to form a cathode body. According to the invention at least both these powders and a suitable binder are mixed with each other to form a homogeneous suspension prior to the pressing operation and the whole mixture is subsequently cured and ground to granules having a larger average size and hence a greater fluidity than the grains of the starting powders. Subsequently the granules thus obtained are pressed to form a cathode body (2). The invention leads to a better processibility and greater convenience of handling of the starting powders so that notably very fine staring powders can be used, which results in cathodes (1) having a better recovery after ion bombardment as compared with cathodes manufactured in conventional manners which are necessarily based on relatively coarse powders.
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Deckers Jacobus A.J.M.
Manenschijn Albert
Snijkers Franciscus M.M.
Van Der Heide Petrus A.M.
Weekers Theodorus H.
Kraus Robert J.
Ramsey Kenneth J.
U.S. Philips Corporation
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