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    • 47. 发明授权
    • Cathode for an electron source and a method of producing the same
    • 电子源用阴极及其制造方法
    • US4193013A
    • 1980-03-11
    • US897406
    • 1978-04-18
    • Masaaki FutamotoUshio KawabeShigeyuki HosokiTsutomu KomodaShigehiko Yamamoto
    • Masaaki FutamotoUshio KawabeShigeyuki HosokiTsutomu KomodaShigehiko Yamamoto
    • B44F1/12H01J1/15H01J1/304H01J9/02H01J9/04H01J9/18
    • H01J1/15H01J1/304
    • A cathode for an electron source according to this invention comprises an emitter tip made of an electron emissive material, a filament for holding the emitter tip, and a binder for binding the emitter tip and the filament, the filament and the binder being made of glassy carbon. The binder can have a carbide or boride powder incorporated therein. The cathode according to this invention can be produced by using a thermosetting resin of predetermined shape as the starting material of the filament, fixing the emitter tip to a predetermined position of the thermosetting resin with the adhesive agent made of the raw thermosetting resin, and heating the resultant assembly in a non-oxidizing atmosphere to carbonize the resinous portions. This cathode is structurally very simple. Moreover, the adhesion between the filament and the emitter tip is excellent, and the emitter tip can be heated to high temperatures above 2,000.degree. C. by causing current to flow through the cathode.
    • 根据本发明的用于电子源的阴极包括由电子发射材料制成的发射极尖端,用于保持发射极尖端的灯丝和用于结合发射极尖端和灯丝的粘合剂,灯丝和粘合剂由玻璃状 碳。 粘合剂可以具有并入其中的碳化物或硼化物粉末。 根据本发明的阴极可以通过使用预定形状的热固性树脂作为丝的起始材料,使用由原始热固性树脂制成的粘合剂将发射极尖端固定到热固性树脂的预定位置,并加热 所得组合物在非氧化气氛中以使树脂部分碳化。 该阴极在结构上非常简单。 此外,灯丝和发射极尖端之间的粘附性优异,并且通过使电流流过阴极,可以将发射极尖端加热到高于2000℃的高温。