公开(公告)号：US4928034A

公开(公告)日：1990-05-22

申请号：US273157

申请日：1988-11-18

Applicant: Sakae Kimura ,  Masaru Nikaido ,  Katumi Yanagibashi ,  Katsuhisa Homma ,  Yoshiaki Ouchi

Inventor： Sakae Kimura ,  Masaru Nikaido ,  Katumi Yanagibashi ,  Katsuhisa Homma ,  Yoshiaki Ouchi

IPC: H01J1/28

CPC classification number: H01J1/28

Abstract: According to the present invention, an impregnated cathode is provided wherein an alloy layer of iridium and tungsten is formed on a surface of a porous pellet impregnated with an oxide of an alkali earth metal, wherein a crystal structure of the alloy has an .epsilon.II phase comprising an hcp structure whose lattice constants a and c satisfy 2.76.ltoreq.a.ltoreq.2.78 and 4.44.ltoreq.c.ltoreq.4.46, respectively. The impregnated cathode of the present invention maintains stable electron emission characteristics from an early stage of operation.

Abstract translation: 根据本发明，提供了一种浸渍阴极，其中在浸渍有碱土金属氧化物的多孔颗粒的表面上形成铱和钨的合金层，其中该合金的晶体结构具有εII相 包括其晶格常数a和c分别满足2.76的hcp结构，并且分别为4.44

公开(公告)号：US4675570A

公开(公告)日：1987-06-23

申请号：US851896

申请日：1986-04-11

Applicant: Michael C. Green

Inventor： Michael C. Green

IPC: H01J1/28 ,  H01J9/04 ,  H01J1/14 ,  H01J19/06

CPC classification number: H01J1/28 ,  H01J9/04

Abstract: Porous agglomerates are made from pure tungsten by sintering fine particles together and mechanically breaking down the mass to form some agglomerates considerably larger than the particles. These agglomerates are mixed with fine iridium powder and sintered to form a porous mass. The mass is machined to the cathode shapes and impregnated with an alkaline earth aluminate. The large agglomerates alloy with the iridium only on their outer surface. Their pure tungsten interior provides the surfaces to reduce the alkaline earth oxide to the metal which activates the cathode.

Abstract translation: 多孔聚集体由纯钨制成，通过将细颗粒烧结在一起并机械地分解物料以形成明显大于颗粒的附聚物。 将这些附聚物与精细铱粉末混合并烧结以形成多孔质量块。 质量被加工成阴极形状并浸渍有碱土金属铝酸盐。 大的附聚物与铱只在其外表面合金。 它们的纯钨内部提供了表面以将碱土金属氧化物还原成活化阴极的金属。

公开(公告)号：US4594220A

公开(公告)日：1986-06-10

申请号：US685678

申请日：1984-12-24

Applicant: Jan Hasker ,  Pieter Hokkeling ,  Johannes van Esdonk ,  Josef J. van Lith

Inventor： Jan Hasker ,  Pieter Hokkeling ,  Johannes van Esdonk ,  Josef J. van Lith

IPC: H01J1/14 ,  H01J1/28 ,  H01J9/04 ,  B22F3/26

CPC classification number: H01J9/047 ,  H01J1/28

Abstract: A method of manufacturing a scandate dispenser cathode having a matrix at least the top layer of which at the surface consists substantially of tungsten (W) and scandium oxide (Sc.sub.2 O.sub.3) and with emitter material in or below said matrix. If said method comprises the following steps:(a) compressing a porous plug of tungsten powder(b) heating said plug in a non-reactive atmosphere and in contact with scandium to above the melting temperature of scandium,(c) cooling the plug in a hydrogen (H.sub.2) atmosphere(d) pulverizing the plug to fragments(e) heating said fragments to approximately 800.degree. C. and firing them at this temperature for a few to a few tens of minutes in a hydrogen atmosphere and slowly cooling in said hydrogen atmosphere(f) grinding the fragments to scandium hydride-tungsten powder (ScH.sub.2 /W)(g) compressing a matrix or a top layer on a matrix of pure tungsten from said ScH.sub.2 /W powder or from a mixture of this powder with tungsten powder(h) sintering and cooling the said matrix(i) bringing emissive material into the cathode, a scandate dispenser cathode is obtained the recovery of which after ion bombardment occurs better than in cathodes having Sc.sub.2 O.sub.3 grains. The scandium is also distributed more homogeneously in the cathode than in cathodes having Sc.sub.2 O.sub.3 grains.

Abstract translation: 一种制造钪酸盐分配器阴极的方法，其具有基体至少其表面的顶层基本上由钨（W）和氧化钪（Sc 2 O 3）构成的基体和在所述基体内或之下的发射体材料。 如果所述方法包括以下步骤：（a）压缩钨粉的多孔塞（b）将所述塞在非反应性气氛中加热并与钪接触以高于钪的熔融温度，（c）将塞冷却 氢气（H2）气氛（d）将塞子粉碎成碎片（e）将所述碎片加热至约800℃，并在该温度下在氢气气氛中将其烧制几至几十分钟，并在所述 氢气气氛（f）将碎片研磨成氢化钨 - 钨粉（ScH2 / W）（g）从所述ScH2 / W粉末或从该粉末与钨的混合物中压制纯钨基体上的基体或顶层 粉末（h）烧结和冷却所述基质（i）将发射材料引入阴极，得到钪酸盐分配器阴极，其在离子轰击之后的回收比具有Sc 2 O 3晶粒的阴极更好地发生。 钪也在阴极中分布得更均匀，而不是具有Sc2O3晶粒的阴极。

公开(公告)号：US3753025A

公开(公告)日：1973-08-14

申请号：US3753025D

申请日：1971-12-01

Applicant: PHILIPS CORP

Inventor： VAN STRATUM A ,  LOYEN S ,  VAN OS J

IPC: H01J1/28 ,  H01J1/88 ,  H01J1/26 ,  H01J19/42

CPC classification number: H01J1/28

Abstract: A supply cathode having a large diameter in which the emissive body is supported by a metal base plate having metal pins which are embedded in the sintered emissive body.

Abstract translation: 具有大直径的供应阴极，其中发射体由具有嵌入在烧结发射体中的金属针的金属基板支撑。

公开(公告)号：US3681644A

公开(公告)日：1972-08-01

申请号：US3681644D

申请日：1970-09-30

Applicant: SIEMENS AG

Inventor： HOFMANN HORST ,  HUEBNER ERWIN ,  KATZ HELMUT

IPC: H01J1/28 ,  H01J9/04 ,  H01J1/14

CPC classification number: H01J9/04 ,  H01J1/28

Abstract: A dispenser MK-type cathode structure adapted for storage and/or handling with subsequent activation and a method of producing the same whereby a supply source material of an emission-promoting substance is positioned in an open-ended storage chamber of a plug-like cathode insert member and sealed within the chamber by a fluid impermeable pore-free mask member. A porously sintered tungsten disc member sits above the mask member so as to have an undersurface thereof in fluid communication with the supply source material upon rupture of the mask member. The mask member is sealed to the boundaries of the storage chamber by a selfsticking organic polymer material which is thermally decomposable without residue at operational temperatures of such dispenser cathodes. The mask member comprises a unitary structure composed of a high melting metal foil having at least one surface thereof coated with the organic polymer material, a lamina of a film forming organic material having a layer of the self-thicking organic polymer material along a surface thereof or a self supporting film of the organic polymer material. The mask member is provided in a controlled thickness of sufficient dimension to resist rupture until the environment around the sealed storage chamber is subjected to cathode vacuum conditions.

公开(公告)号：US3676731A

公开(公告)日：1972-07-11

申请号：US3676731D

申请日：1971-03-03

Applicant: SIEMENS AG

Inventor： HOFMANN HORST ,  KATZ HELMUT

IPC: H01J1/28 ,  H01J9/04 ,  H01J1/14 ,  H01J19/06

CPC classification number: H01J9/042 ,  H01J1/28

Abstract: A dispenser MK-type cathode structure adapted for prolonged storage and handling with subsequent activation and a method of producing the same whereby a supply source material capable of yielding barium, such as alkaline-earth oxides or carbonates, i.e., barium carbonates or barium oxide, is positioned in an open-ended storage chamber of a suitable member and a porously sintered cover member seals the supply source material within the storage chamber. The cover member is composed of tungsten and includes coatings of osmium and/or rhenium on its active or emission surface. Such cover member is further provided with a tightly adhering protective coating that is vapor and humidity impermeable and is composed of a hydrophobic material, such as paraffin or methyl mathacrylate resin or other heat-vaporizable hydrophobic material.

公开(公告)号：US3652894A

公开(公告)日：1972-03-28

申请号：US3652894D

申请日：1970-06-30

Applicant: LICENTIA GMBH

Inventor： HELD WALTER

IPC: H01J1/24 ,  H01J1/28 ,  H01J19/18

CPC classification number: H01J1/28 ,  H01J1/24

Abstract: An indirectly heated hot-cathode has a metallic cathode sleeve having inner walls defining a cavity. An electric heating element is arranged in the cavity defined by the cathode sleeve. The necessary electrical insulation between the heating element and the cathode sleeve is maintained by an insulating member shaped to conform to and arranged to at least partially cover the inner walls of the cathode sleeve, and constructed of a material selected from the group consisting of ruby, quartz and sapphire.

Abstract translation: 间接加热的热阴极具有金属阴极套管，其具有限定空腔的内壁。 电加热元件设置在由阴极套筒限定的空腔中。 加热元件和阴极套管之间的必要的电绝缘由绝缘构件保持，绝缘构件被成形为符合并被布置成至少部分地覆盖阴极套筒的内壁，并且由选自由红宝石， 石英和蓝宝石。

公开(公告)号：US3558966A

公开(公告)日：1971-01-26

申请号：US3558966D

申请日：1967-03-01

Applicant: SEMICON ASSOCIATES INC

Inventor： HILL DAVID L ,  WU LIEN S

IPC: H01J1/28 ,  H01J23/05 ,  H01J1/14 ,  H01H1/04 ,  H01J19/06

CPC classification number: H01J1/28 ,  H01J23/05

Abstract: A directly heated dispenser-type cathode for microwave tubes and the like, the cathode being formed by a solid electrically conductive substrate, such as tungsten wire, the surface of which has bonded thereto a porous layer of a refractory metal whose pores are impregnated with an electron-emissive material having a low work function, such as barium oxide.

公开(公告)号：US3434812A

公开(公告)日：1969-03-25

申请号：US3434812D

申请日：1966-09-08

Applicant: GEN ELECTRIC

Inventor： BONDLEY RALPH J

IPC: C22C32/00 ,  H01J1/28 ,  H01J9/04 ,  B22F5/00

CPC classification number: C22C32/0015 ,  H01J1/28 ,  H01J9/047

公开(公告)号：US3384511A

公开(公告)日：1968-05-21

申请号：US52048866

申请日：1966-01-13

Applicant: BELL TELEPHONE LABOR INC

Inventor： MAURER DEAN W ,  PLEASS CHARLES M

IPC: C23C16/442 ,  H01J1/14 ,  H01J1/28 ,  H01J9/04

CPC classification number: H01J1/28 ,  B22F2998/00 ,  C23C16/442 ,  H01J1/14 ,  H01J9/042 ,  B22F1/025