中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

42 records (took 0.022 seconds)

    Annular gap cathodes with graphite caps
    23.
    发明授权
    Annular gap cathodes with graphite caps 有权

    公开(公告)号：US12057285B2

    公开(公告)日：2024-08-06

    申请号：US18388122

    申请日：2023-11-08

    Applicant: Kimball Physics, Inc.

    Inventor： George Douglas Calvey

    IPC: H01J1/15 ,  H01J1/148 ,  H01J9/04

    CPC classification number: H01J1/15 ,  H01J1/148 ,  H01J9/04

    Abstract: A cathode device including an emitter element for generating electrons. The emitter element can have an outer periphery and a distal tip. The tip can have a first angled surface that angles inwardly from the outer periphery, and a second angled surface that angles inwardly and is separated and inwardly offset from the first angled surface by a shoulder. A graphite cap which can be solid, extends around the emitter element and has an internal angled surface that engages the first angled surface of the tip of the emitter element, forming a gap of a controlled size separating the internal angled surface of the graphite cap from the second angled surface of the tip of the emitter element.

    Electron emission materials and components
    26.
    发明授权
    Electron emission materials and components 失效
    电子发射材料和组件

    公开(公告)号：US6051165A

    公开(公告)日：2000-04-18

    申请号：US258990

    申请日：1999-02-26

    Applicant: Garth W. Billings

    Inventor： Garth W. Billings

    IPC: H01B1/06 ,  H01J1/14 ,  H01J1/142 ,  H01J1/144 ,  H01J1/148 ,  H01J1/304 ,  H01B1/02 ,  H01J1/00 ,  H01J1/02

    CPC classification number: B82Y10/00 ,  H01B1/06 ,  H01J1/14 ,  H01J1/142 ,  H01J1/144 ,  H01J1/148 ,  H01J1/304 ,  H01J2201/19

    Abstract: Electron emission materials consisting of carbides, borides, and oxides, and related mixtures and compounds, of Group IVB metals Hf, Zr, and Ti, Group IIA metals Be, Mg, Ca, Sr, and Ba, and Group IIIB metals Sc, Y, and lanthanides La through Lu are used in electrodes. The electron emission materials include ternary Group IVB-IIIB and IVB-IIA oxides. These electron emission materials are typically contained in a refractory metal matrix formed of tungsten, tantalum, rhenium, and their alloys, but may also be used by themselves. These materials and electrodes have high melting points, low vapor pressures, low work functions, high electrical and thermal conductivity, and high thermionic electron emission and field emission properties.

    Abstract translation: 由ⅣB族金属Hf，Zr和Ti，IIA族金属Be，Mg，Ca，Sr和Ba以及IIIB族金属组成的由碳化物，硼化物和氧化物组成的电子发射材料及相关混合物和化合物Sc，Y ，镧系元素La-Lu用于电极。 电子发射材料包括IVB-IIIB族和IVB-IIA族三元氧化物。 这些电子发射材料通常包含在由钨，钽，铼及其合金形成的难熔金属基体中，但也可以自己使用。 这些材料和电极具有高熔点，低蒸汽压力，低功函数，高导热性和高热电子发射和场发射性能。

    Hexaboride electron emissive material
    29.
    发明授权
    Hexaboride electron emissive material 失效
    六硼化物电子发射材料

    公开(公告)号：US3932314A

    公开(公告)日：1976-01-13

    申请号：US503471

    申请日：1974-09-05

    Applicant: Ushio Kawabe ,  Shigehiko Yamamoto ,  Toshiyuki Aita ,  Yukio Honda

    Inventor： Ushio Kawabe ,  Shigehiko Yamamoto ,  Toshiyuki Aita ,  Yukio Honda

    IPC: H01J1/30 ,  C01B35/04 ,  C04B35/58 ,  H01J1/14 ,  H01J1/148 ,  H01J1/304 ,  H01B1/06

    CPC classification number: H01J1/148 ,  H01J1/304

    Abstract: An electron emissive material of the formula (Y.sub.1.sub.-x EU.sub.x)B.sub.6 having the calcium hexaboride type crystal structure can easily produce hexaborides of the single phase. These borides have a number of merits such as small work function, high mechanical properties and low vapor pressure, and they are far more excellent than prior-art materials when used in a thermionic emission cathode and a field emission type cold cathode.

    Abstract translation: 具有六硼化钙型晶体结构的式（Y1-xEUx）B6的电子发射材料可以容易地生产单相六硼化物。 这些硼化物具有功函数小，机械性能好，蒸气压低的优点，而且当用于热电子发射阴极和场致发射型冷阴极时，它们比现有技术的材料要好得多。

Patent Agency Ranking