公开(公告)号：US5126622A

公开(公告)日：1992-06-30

申请号：US610056

申请日：1990-11-07

Applicant: Jong-in Jeong ,  Jong-seo Choi ,  Hwan-cheol No ,  Kyu-nam Ju

Inventor： Jong-in Jeong ,  Jong-seo Choi ,  Hwan-cheol No ,  Kyu-nam Ju

IPC: H01J1/14 ,  H01J1/142 ,  H01J1/28

CPC classification number: H01J1/28 ,  H01J1/142

Abstract: A dispenser cathode comprises an electron emissive material including at least one selected from the group consisting of Ba and Ba oxide, a porous metal base body having a plurality of diffusing cavities and positioned on the electron emissive material and an alloy thin film layer consisting of scandium tungstate and tungsten which is disposed between the electron emissive material and the porous metal base body. Instead of the alloy thin film, a pellet containing scandium tungstate may be interposed between said electron emissive material and the porous metal base body. The activation aging time of the dispenser cathode of the present invention is greatly shortened as compared with the conventional dispenser cathode, and the damage of Sc by ion bombardment is prevented, and thus the stable thermoelectron emission can be obtained.

Abstract translation: 分配器阴极包括电子发射材料，其包括选自由Ba和Ba氧化物组成的组中的至少一种，具有多个扩散腔并位于电子发射材料上的多孔金属基体和由钪组成的合金薄膜层 钨酸盐和钨，其设置在电子发射材料和多孔金属基体之间。 代替合金薄膜，可以在所述电子发射材料和多孔金属基体之间插入含有钨酸钪的颗粒。 与传统的分配器阴极相比，本发明的分配器阴极的激活老化时间大大缩短，并且防止了通过离子轰击的Sc的损伤，从而可以获得稳定的热电子发射。

公开(公告)号：US5015497A

公开(公告)日：1991-05-14

申请号：US377516

申请日：1989-07-10

Applicant: Kinjiro Sano ,  Toyokazu Kamata ,  Keiji Fukuyama ,  Masato Saito ,  Keiji Watanabe

Inventor： Kinjiro Sano ,  Toyokazu Kamata ,  Keiji Fukuyama ,  Masato Saito ,  Keiji Watanabe

IPC: H01J1/20 ,  H01J1/142 ,  H01J1/28 ,  H01J9/04

CPC classification number: H01J1/142 ,  H01J9/042

Abstract: A cathode for an electron tube in accordance with the present invention comprises: a base (2) containing not only nickel as a major element but also a reducing agent; a layer (3) of an electron-emissive substance which is applied to the base (2) and contains not only an alkaline earth metal oxide as a principal component but also a scandium oxide; and a heater for heating the layer (3).

公开(公告)号：US4924137A

公开(公告)日：1990-05-08

申请号：US307709

申请日：1989-02-08

Applicant: Keiji Watanabe ,  Keiji Fukuyama ,  Masako Ishida ,  Ryo Suzuki ,  Masato Saito

Inventor： Keiji Watanabe ,  Keiji Fukuyama ,  Masako Ishida ,  Ryo Suzuki ,  Masato Saito

IPC: H01J1/142

CPC classification number: H01J1/142

Abstract: An oxide-coated cathode for an electron tube comprises a layer (2) of an electron-emissive substance. This layer (2) contains: an alkaline earth metal oxide as a principal component containing at least Ba; an oxide of Sc; and at least one heat-resisting oxide selected from the group consisting of oxides of Al, Si, Ta, V, Cr, Fe, Zr, Nb, Hf, Ta, Mo and W.

公开(公告)号：US4369392A

公开(公告)日：1983-01-18

申请号：US187701

申请日：1980-09-16

Applicant: Sadayoshi Hotta ,  Masanori Watanabe

Inventor： Sadayoshi Hotta ,  Masanori Watanabe

IPC: H01J1/142 ,  H01J1/14

CPC classification number: H01J1/142

Abstract: An oxide-coated cathode used for the electron tubes such as cathode ray tubes and camera tubes, comprising as the base a sintered product principally composed of an alkaline earth metal compound and a high-melting-point metal and having high heat conductivity and low specific resistance, said sintered product being either used singly or layered on a high-melting-point metal body containing a reducible element or elements as impurity, and an oxide cathode material coated on said base, and a method of producing such oxide-coated cathode.

Abstract translation: 用于阴极射线管和照相机管等电子管的氧化物被覆阴极，其特征在于，以碱土金属化合物和高熔点金属为主要成分，具有高导热性，低特异性的烧结体 电阻，所述烧结产品单独使用或分层在含有可还原元素或杂质的元素的高熔点金属体上，以及涂覆在所述基底上的氧化物阴极材料，以及制备这种氧化物涂覆的阴极的方法。

公开(公告)号：US3088851A

公开(公告)日：1963-05-07

申请号：US4735760

申请日：1960-08-04

Applicant: PHILIPS CORP

Inventor： JOHANNES LEMMENS HENDRIKUS ,  JAN BLOEM ,  DE HAAN EDWARD FOKKO ,  JACOBUS JANSEN MARINUS

IPC: H01J1/142

CPC classification number: H01J1/142 ,  Y10T428/31678

公开(公告)号：US2559530A

公开(公告)日：1951-07-03

申请号：US55395944

申请日：1944-09-13

Applicant: RAYTHEON MFG CO

Inventor： BECKER CARL W

IPC: H01J1/142

CPC classification number: H01J1/142

公开(公告)号：US2015325A

公开(公告)日：1935-09-24

申请号：US36794829

申请日：1929-06-03

Applicant: RAYTHEON PRODUCTION CORP

Inventor： SPENCER PERCY L

IPC: H01J1/142

CPC classification number: H01J1/142 ,  Y10T428/12111 ,  Y10T428/12778

公开(公告)号：US1892528A

公开(公告)日：1932-12-27

申请号：US30460928

申请日：1928-09-07

Applicant: SIRIAN LAMP CO

Inventor： ALLEN HEANY JOHN

IPC: H01J1/142 ,  H01J9/04

CPC classification number: H01J9/042 ,  H01J1/142

公开(公告)号：US09646796B1

公开(公告)日：2017-05-09

申请号：US14218680

申请日：2014-03-18

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Jin-Shu Wang ,  Wei Liu ,  Li-Ran Dong ,  Qiang Wang ,  Xiang Liu ,  Fan Zhou ,  Mei-Ling Zhou ,  Tie-Yong Zuo

IPC: H01J19/06 ,  H01K1/04 ,  H01J1/14 ,  H01J1/28 ,  H01J1/142 ,  H01J1/20 ,  H01J9/04

CPC classification number: H01J1/28 ,  H01J1/14 ,  H01J1/142 ,  H01J1/20 ,  H01J9/042

Abstract: A method of manufacturing carburized Lu2O3 doped Mo cathodes for thermionic emission for magnetrons is described. The Lu2O3 doped Mo powder is prepared by sol-gel method. The powder is reduced thoroughly in hydrogen atmosphere. Afterwards, the powder is die-pressed into pellets, followed by sintering in hydrogen and carburization in activated carbon powder to obtain the carburized Lu2O3 doped Mo cathode.

公开(公告)号：US20140174913A1

公开(公告)日：2014-06-26

申请号：US14236145

申请日：2012-07-31

Applicant: Georg Friedrich Gaertner ,  Wilhelmus Cornelis Keur

Inventor： Georg Friedrich Gaertner ,  Wilhelmus Cornelis Keur

IPC: H01J1/142 ,  C23C14/34

CPC classification number: H01J1/142 ,  C23C14/082 ,  C23C14/3414 ,  H01J1/28 ,  H01J23/04

Abstract: The invention relates to the field of production of barium-scandate dispenser cathodes or other barium-scan-date materials. A target (66) containing a mixture of BaO, CaO, Al2O3 and SC2O3 tends to be more stable, the higher the scandia (scandium oxide) content is. However, an increased scandia content results in a reduced emission capability. A destabilizing effect of BaO and CaO reactions is counteracted by the more inert SC2O3 and also AI2O3 components, as not only an increased scandia content stabilizes the material but also an increased alumina (aluminum oxide) content improves the stability.

Abstract translation: 本发明涉及钡 - 钪酸盐分配器阴极或其它钡扫描日期材料的生产领域。 包含BaO，CaO，Al 2 O 3和SC 2 O 3的混合物的靶（66）倾向于更稳定，所述Scandia（钪氧化物）含量越高。 然而，增加的scandia含量会降低排放能力。 BaO和CaO反应的不稳定作用被更为惰性的SC2O3和Al2O3组分所抵消，因为不仅增加了Scandia含量，而且氧化铝（氧化铝）含量的增加也提高了稳定性。