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    • 43. 发明授权
    • Hot cathode of X-ray tube
    • X射线管热阴极
    • US06738453B2
    • 2004-05-18
    • US10245660
    • 2002-09-17
    • Takeyoshi TaguchiKatsumi TsukamotoMasaru Kuribayashi
    • Takeyoshi TaguchiKatsumi TsukamotoMasaru Kuribayashi
    • H01J3506
    • H01J1/20H01J9/04H01J35/06
    • In a hot cathode of an X-ray tube of the kind having a thermoelectronic emitter supported by a heating element, the emitter is comprised of plural emitter regions separated from each other. Each emitter region has the largest measure less than 3 mm, so that no crack occurs on the thermoelectronic emitter. The hot cathode is comprised of a heating element made of glassy carbon and a thermoelectronic emitter supported by the heating element. The emitter is comprised of plural emitter regions made of sintered lanthanum hexaboride. The hot cathode can be produced as described below. The heating element with a thickness of 1 mm is formed, at its thermoelectron-emitting side, with four recesses each of which is 2.6 mm in length, 0.5 mm in width and 0.3 mm in depth. The recesses are filled with lanthanum hexaboride powder, which is then sintered to complete four emitter regions.
    • 在具有由发热元件支撑的热电子发射体的X射线管的热阴极中,发射极由彼此分离的多个发射极区域组成。 每个发射极区域具有小于3mm的最大测量值,使得在热电子发射器上不发生裂纹。 热阴极由玻璃碳制成的加热元件和由加热元件支撑的热电子发射体组成。 发射极由多个由烧结镧六硼化物制成的发射极区域组成。 热阴极可以如下所述地制造。 厚度为1mm的加热元件在其热电子发射侧形成四个凹槽,每个凹槽的长度为2.6mm,宽度为0.5mm,深度为0.3mm。 这些凹槽用六硼化镧粉末填充,然后将其烧结以完成四个发射极区域。