H - Electricity – 01 – J
Patent
H - Electricity
01
J
31/131, 313/187,
H01J 9/04 (2006.01) H01J 1/28 (2006.01)
Patent
CA 1265329
PHN11.170 10 5.5.1985 ABSTRACT: Method of manufacturing a scandate dispenser cathode and dispenser cathode manufactured by means of the method. A method of manufacturing a scandate dispenser cathode having a matrix at least the top layer of which at the surface consists substantially of tungsten (W) and scandium oxide (Sc2O3) and with emitter material in or below said matrix. If said method comprises the following steps: a) compressing a porous plug of tungsten powder; b) heating said plug in a non-reactive atmosphere and in contact with scandium to above the melting temperatu- re of scandium; c) cooling the plug in a hydrogen (H2) atmosphere; d) pulverizing the plug to fragments; e) heating said fragments to approximately 800°C and firing them at this temperature for a few to a few tens of minutes in a hydrogen atmosphere; f) grinding the fragments to scandium hydride-tungsten powder (ScH2/W); g) compressing a matrix or a top layer on a matrix of pure tungsten from said ScH2/W powder or from a mixture of this powder with tungsten powder; h) sintering and cooling the said matrix, 1) bringing emissive material in the cathode, a scandate dispenser cathode is obtained the recovery of which after ion bonbardment occurs better than in cathodes having Sc2O3. The scandium is also distributed more homo- geneously in the cathode than in cathodes having Sc2O3 grains.
492136
Esdonk Johannes Van
Hasker Jan
Hokkeling Pieter
Van Lith Josef J.
Fetherstonhaugh & Co.
N.v. Philips Gloeilampenfabrieken
LandOfFree
Method of manufacturing a scandate dispenser cathode and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of manufacturing a scandate dispenser cathode and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacturing a scandate dispenser cathode and... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1168389