Application of Hydrogen Vacuum Treatment of Palladium Powders for Production of Efficient Metal Alloy Cathodes of Self-Heated Magnetron

摘要

A method to improve emission homogeneity of pressed palladium-barium cathodes applied in magnetrons with self-heating initiation is proposed. The initial palladium powder is annealed at 950℃ for 60 min and then calcined in vacuum under pressure of residual gases P≤ 1 × 10~(-4) Pa. It is demonstrated that cathodes produced by pressing and subsequent sintering of a powdered mixture of palladium and intermetal-lic compound Pd_5Ba in vacuum are characterized by a high distribution homogeneity of components. Within testing of magnetrons produced with such cathodes, the yield of good items is increased by a factor of 1.5.