METHOD OF MANUFACTURING A SCANDATE DISPENSER CATHODE AND SCANDATE DISPENSER CATHODE MANUFACTURED ACCORDING TO THE METHOD

摘要

: Method of manufacturing a scandate dispenser cathode and scandate dispenser cathode manufactured according to the method. A method of manufacturing a scandate dispenser cathode having a matrix (1) at least the top layer of which consists substantially of a mixture of tungsten with scandium oxide or with a mixed oxide comprising scandium oxide. When sintering of the matrix is carried out at a temperature between 1300 and 1700.degree.C, preferably at approximately 1500.degree.C and in a hydrogen atmosphere, cathodes are obtained having a better recovery after ion bombardment compared with cathodes sintered at 1900.degree.C. Sintering in hydrogen results in a better reproducibility.