热场发射阴极及其制备方法、及应用其的真空电子器件

    公开(公告)号:CN107564783A

    公开(公告)日:2018-01-09

    申请号:CN201710794394.6

    申请日:2017-09-05

    Abstract: 热场发射阴极及其制备方法、及应用其的真空电子器件,其中热场发射阴极包括钼筒及固定于其上的钨海绵体,其中:钨海绵体的上表面具有微尖阵列,该微尖阵列内部具有孔隙;钨海绵体内部的孔隙与微尖阵列内部的孔隙形成连通孔隙;连通孔隙内填充有活性物质。由于在钨海绵体表面形成有微尖阵列,且构成从钨海绵体直达微尖阵列内部孔隙的连通孔隙,该连通孔隙填有活性物质,从而在热扩散作用下,该活性物质可达到微尖阵列顶部,为实现低功函数的发射提供了条件,因此本发明的热场发射阴极的发射性能相较于传统的热发射阴极,工作温度及功耗大幅降低;相较于传统的场发射阴极,发射电流密度更高,且具有较强的抗打火能力。

    具有无钍阴极的直流气体放电灯

    公开(公告)号:CN106558470A

    公开(公告)日:2017-04-05

    申请号:CN201610865978.3

    申请日:2016-09-29

    Abstract: 本发明涉及一种直流气体放电灯,具有阳极和包括第一阴极部件(108)的阴极(100),该第一阴极部件至少在阴极的一个区域中形成阴极的表面,该区域面对阳极的并且具有电弧生成区域(104d),在电弧生成区域内部在常规的灯运行时形成在阴极和阳极之间燃烧的电弧。第一阴极部件由具有至少一种发射极材料的钨构成,以用于降低来自阴极的电子的输出功,该阴极无钍地设计。至少一种发射极材料具有小于3200K的熔化温度。阴极的在电弧生成区域的外部表面的至少一部分通过用于至少一种发射极材料的扩散势垒(106,106a,106b,107)形成。

    一种耐轰击的电子发射材料及其制备方法

    公开(公告)号:CN105679624A

    公开(公告)日:2016-06-15

    申请号:CN201610120082.2

    申请日:2016-03-03

    Inventor: 姚斌雄

    CPC classification number: H01J1/142 H01J1/144 H01J9/02

    Abstract: 本发明涉及照明材料领域,公开了一种耐轰击的电子发射材料及其制备方法。耐轰击的电子发射材料包括以下质量份的物质:52-56份Ba(CO)2,30-34份Sr(CO)2,10-15份Ca(CO)2,1-3份稀土氧化物。制备方法为按配比称取Ba(NO3)2溶液,Sr(NO3)2溶液,Ca(NO3)2溶液并混合均匀,制得混合硝酸盐水溶液,向所述混合硝酸盐水溶液中滴入(NH4)2CO3溶液得到共沉淀结晶,过滤后取共沉淀结晶烘干,并球磨40-56h,最后加入CeO2并混合均匀便制得耐轰击的电子发射材料。本发明的耐轰击的电子发射材料具有粘结性好、耐粒子轰击好、低逸出功的特点,能够有效延长灯管寿命。

    CATHODE AND ITS MANUFACTURING METHOD

    公开(公告)号:JP2002075165A

    公开(公告)日:2002-03-15

    申请号:JP2000262091

    申请日:2000-08-31

    Abstract: PROBLEM TO BE SOLVED: To provide a cathode and its manufacturing method which is easy to handle is without deleterious effects and is stable at a temperature higher than 1,400 deg.C and also can obtain a structure of advantageous electron emission characteristics. SOLUTION: This cathode includes a polycrystalline 1 or a porous substance, having a high-melting point consisting of, for instance, W and an emissive material 2, in which at least one material selected from among a group of hafnium oxide, zirconium oxide, lanthanum oxide, ceric oxide and titanium oxide is dispersed into the polycrystalline substance, with the content being 0.1 to 3 weight %.

    一种热电子发射装置及电子器件

    公开(公告)号:CN218957665U

    公开(公告)日:2023-05-02

    申请号:CN202222758683.X

    申请日:2022-10-19

    Applicant: 北京大学

    Abstract: 本实用新型公开一种热电子发射装置及电子器件,涉及电真空器件领域,该热电子发射装置包括两个金属电极、热电子发射灯丝和刚性绝缘支撑结构;其中,所述刚性绝缘支撑结构的两端分别固定在所述两个金属电极上;所述热电子发射灯丝为螺旋形状,缠绕在所述刚性绝缘支撑结构上,并且其两端丝尾分别连接于所述两个金属电极。通过在热电子发射装置内增设刚性绝缘支撑结构来支撑热电子发射灯丝,以达到增强热电子发射灯丝机械强度,使其在高温工作状态下保形,从而增强灯丝抗冲击性,工作稳定性,提高灯丝使用寿命,拓展灯丝使用环境。

    CATHODE FOR ELECTRON TUBE
    39.
    发明专利

    公开(公告)号:JPH11195365A

    公开(公告)日:1999-07-21

    申请号:JP29744798

    申请日:1998-10-20

    Abstract: PROBLEM TO BE SOLVED: To provide a cathode having high current density of an electron beam by forming an electron emitting substance layer mainly composed of alkaline earth metal oxide or the base metal mainly composed of nickel, and laying/ forming/heating rare earth metal or a rare earth metal compound on the surface of the electron emitting substance layer. SOLUTION: An electron emitting substance layer 12 is laid/formed on the upper surface of the base metal 11 by supporting the base metal 11 by a cathode support stand. An electron beam control grid 14 forming an electron beam passing hole is formed in front of the electron emitting substance layer 12 so that a heater 13 to heat a base board is arranged on the inside surface of the base metal 11. Here, the base metal 11 contains a small quantity of magnesium and silicon by being mainly composed of nickel, and the electron emitting substance layer 12 is desirably composed of oxide of alkaline earth metal such as Ba, Sr and Ca. A rare earth metal compound 15 is laid/formed on the surface of the electron emitting substance layer 12. Therefore, an electron having high electric current density is emitted from a cathode for an electron tube.

    40.
    发明专利
    失效

    公开(公告)号:JPH0627004B2

    公开(公告)日:1994-04-13

    申请号:JP12721687

    申请日:1987-05-26

    Abstract: Hexagonal-bipyramid crystalline scandium oxide powder and a process for preparing the same are disclosed. The process comprises forming scandium oxalate from an acid aqueous solution containing scandium in the presence of chloride ions and ammonium ions, collecting the precipitate and heating the collected precipitate. Hexagonal-bipyramid crystalline scandium oxide is useful for making electron gun for cathode ray tubes.

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