公开(公告)号：US2703790A

公开(公告)日：1955-03-08

申请号：US30687952

申请日：1952-08-28

Applicant: RAYTHEON MFG CO

Inventor： ANDERSON MAURITZ L

IPC: H01J1/142 ,  H01J9/04

CPC classification number: H01J1/142 ,  H01J9/042

公开(公告)号：US2290913A

公开(公告)日：1942-07-28

申请号：US28964439

申请日：1939-08-11

Applicant: LORENZ C AG

Inventor： EDMUND LOPP ,  ERHARD ZINKE

IPC: H01J1/142

CPC classification number: H01J1/142

公开(公告)号：US11075049B2

公开(公告)日：2021-07-27

申请号：US16601620

申请日：2019-10-15

Applicant: The Government of the United States of America, as represented by the Secretary of the Navy

Inventor： Boris N. Feigelson ,  James A. Wollmershauser ,  Kedar Manandhar

IPC: H01J9/04 ,  B22F1/02 ,  H01J1/146 ,  H01J1/144 ,  H01J1/28 ,  H01J1/142 ,  B22F3/26

Abstract: A thermionic dispenser cathode having a refractory metal matrix with scandium and barium compounds in contact with the metal matrix and methods for forming the same. The invention utilizes atomic layer deposition (ALD) to form a nanoscale, uniform, conformal distribution of a scandium compound on tungsten surfaces and further utilizes in situ high pressure consolidation/impregnation to enhance impregnation of a BaO—CaO—Al2O3 based emissive mixture into the scandate-coated tungsten matrix or to sinter a tungsten/scandate/barium composite structure. The result is a tungsten-scandate thermionic cathode having improved emission.

公开(公告)号：US20200043691A1

公开(公告)日：2020-02-06

申请号：US16601620

申请日：2019-10-15

Applicant: The Government of the United States of America, as represented by the Secretary of the Navy

Inventor： Boris N. Feigelson ,  James A. Wollmershauser ,  Kedar Manandhar

IPC: H01J9/04 ,  B22F1/02 ,  H01J1/146 ,  H01J1/144 ,  H01J1/28 ,  H01J1/142 ,  B22F3/26

Abstract: A thermionic dispenser cathode having a refractory metal matrix with scandium and barium compounds in contact with the metal matrix and methods for forming the same. The invention utilizes atomic layer deposition (ALD) to form a nanoscale, uniform, conformal distribution of a scandium compound on tungsten surfaces and further utilizes in situ high pressure consolidation/impregnation to enhance impregnation of a BaO—CaO—Al2O3 based emissive mixture into the scandate-coated tungsten matrix or to sinter a tungsten/scandate/barium composite structure. The result is a tungsten-scandate thermionic cathode having improved emission.

公开(公告)号：US09349561B2

公开(公告)日：2016-05-24

申请号：US13340701

申请日：2011-12-30

Applicant: Jinshu Wang ,  Wei Liu ,  Fan Yang ,  Xiang Liu ,  Hongyi Li ,  Meiling Zhou ,  Tieyong Zuo

Inventor： Jinshu Wang ,  Wei Liu ,  Fan Yang ,  Xiang Liu ,  Hongyi Li ,  Meiling Zhou ,  Tieyong Zuo

IPC: H01J1/14 ,  H01J1/142 ,  H01J1/13 ,  H01J1/144 ,  H01J9/04 ,  H01J23/05

CPC classification number: H01J1/142 ,  H01J1/13 ,  H01J1/14 ,  H01J1/144 ,  H01J9/047 ,  H01J23/05

Abstract: Impregnated rare earth metal-containing barium-aluminum-scandate cathodes with a rare earth oxide doped tungsten matrix and methods for the fabrication thereof are described. In one aspect, an impregnated rare earth metal-containing barium-aluminum-scandate cathode comprises: a rare earth oxide doped tungsten matrix, and an impregnated active substance. The active substance comprises scandium oxide (Sc2O3), a second rare earth oxide, and barium calcium aluminate, wherein the molar ratio of Ba:Ca:Al is about 4:1:1.

Abstract translation: 描述了具有稀土氧化物掺杂钨基体的含浸稀土金属的钡 - 铝 - 钪酸盐阴极及其制造方法。 一方面，含浸稀土金属的钡 - 铝 - 钪酸盐阴极包括：掺杂稀土氧化物的钨基体和浸渍的活性物质。 活性物质包含氧化钪（Sc 2 O 3），第二稀土氧化物和铝酸钡钙，其中Ba:Ca:Al的摩尔比为约4:1:1。

公开(公告)号：US07138754B2

公开(公告)日：2006-11-21

申请号：US10246396

申请日：2002-09-19

Applicant: Seung-Kwon Han ,  Jong-Seo Choi ,  Dong-Hee Han ,  Sung-Hwan Moon

Inventor： Seung-Kwon Han ,  Jong-Seo Choi ,  Dong-Hee Han ,  Sung-Hwan Moon

IPC: H01J1/142 ,  H01J19/062 ,  H01J1/20

CPC classification number: H01J1/20 ,  H01J1/142 ,  H01J9/04

Abstract: An oxide cathode for an electron tube and a method for manufacturing the oxide cathode are provided. In the oxide cathode including a sleeve for a heater, a metal substrate formed on the top of the sleeve, and an electron emission material layer coated on the metal substrate, the electron emission material layer is formed by coating a carbonate paste containing an alkaline earth metal carbonate, an organic blowing agent, and a vehicle on the metal substrate by screen printing, and thermally treating the coated carbonate paste. Picture quality degradation due to a Moire phenomenon is reduced by coating the carbonate paste by screen printing to provide an even cathode surface, and degradation of the cathode by Joule heat is reduced, thereby improving electron emission and lifespan characteristics of the cathode.

公开(公告)号：US6140753A

公开(公告)日：2000-10-31

申请号：US63943

申请日：1998-04-21

Applicant: Gyu-Nam Joo ,  Jong-Seo Choi ,  Yoon-Chang Kim

Inventor： Gyu-Nam Joo ,  Jong-Seo Choi ,  Yoon-Chang Kim

IPC: H01J1/142 ,  H01J1/20

CPC classification number: H01J1/142

Abstract: The present invention includes a cathode for an electron gun having a base metal mainly composed of nickel and containing one kind of reducing element at least, a metal layer mainly composed of nickel or nickel-zirconium on the upper side of the base metal, and an electron emitting material layer containing alkaline earth metal oxide including barium at least on the upper side of the metal layer. The metal layer is formed by spreading nickel or nickel-zirconium on the base metal and heating it or by adhering nickel or nickel-zirconium powder thereon to have particle smaller than that of the base metal, to increase its life cycle under a high current density load by ensuring a diffusion route of reducing element steadily for good generation of free radical barium atom. In another aspect, the present invention proposes a cathode for an electron gun further having a second electron emitting material layer containing both of lanthanum compound and magnesium compound or lanthanum-magnesium mixed compound in alkaline earth metal oxide containing barium at least on the upper side of the electron emitting material layer.

Abstract translation: 本发明包括一种用于电子枪的阴极，其具有主要由镍构成的贱金属和至少含有一种还原元素的金属层，在贱金属的上侧主要由镍或镍 - 锆构成的金属层，以及 至少在金属层的上侧含有包含钡的碱土金属氧化物的电子发射材料层。 金属层通过在基底金属上铺展镍或镍 - 锆并加热或通过在其上粘附镍或镍 - 锆粉末而具有小于母体金属的颗粒而形成，以在高电流密度下增加其寿命周期 通过确保还原元素的扩散途径稳定地产生自由基钡原子来实现负载。 另一方面，本发明提出了一种电子枪用阴极，该阴极还具有含有镧化合物和镁化合物或镧 - 镁混合化合物的第二电子发射材料层，所述第二电子发射材料层至少含有钡的碱土金属氧化物 电子发射材料层。

公开(公告)号：US6033280A

公开(公告)日：2000-03-07

申请号：US988316

申请日：1997-12-10

Applicant: Tetsuro Ozawa ,  Yoshiki Hayashida ,  Hiroshi Sakurai

Inventor： Tetsuro Ozawa ,  Yoshiki Hayashida ,  Hiroshi Sakurai

IPC: H01J29/04 ,  H01J1/142 ,  H01J1/316 ,  H01J9/04

CPC classification number: H01J9/042 ,  H01J1/142 ,  H01J1/316

Abstract: An emitter material for a CRT comprises mixed crystal or solid solution of at least two kinds of alkaline earth metal carbonate, wherein at least one alkaline earth metal carbonate is dispersed or separated in the mixed crystal or solid solution. The alkaline earth metal carbonate, which is an emitter material for the CRT, is coated onto the base metal and thermally decomposed in a vacuum to from an emitter of an alkaline earth metal. This emitter, which is proper for a larger screen size, high brightness and high resolution CRT, can be provided with enough life characteristics even under the operating condition of the emission current density of 2A/cm.sup.2.

Abstract translation: 用于CRT的发射体材料包括至少两种碱土金属碳酸盐的混合晶体或固溶体，其中至少一种碱土金属碳酸盐在混晶或固溶体中分散或分离。 作为CRT的发射体材料的碱土金属碳酸盐被涂覆在贱金属上，并在真空中从碱土金属的发射极热分解。 即使在2A / cm2的发射电流密度的工作条件下，这种适用于较大屏幕尺寸，高亮度和高分辨率CRT的发射器也可提供足够的寿命特性。

公开(公告)号：US5925976A

公开(公告)日：1999-07-20

申请号：US966113

申请日：1997-11-07

Applicant: Yoshiki Hayashida ,  Tetsuro Ozawa ,  Hiroshi Sakurai ,  Masaki Kawasaki

Inventor： Yoshiki Hayashida ,  Tetsuro Ozawa ,  Hiroshi Sakurai ,  Masaki Kawasaki

IPC: H01J1/142 ,  H01J1/14

CPC classification number: H01J1/142

Abstract: A cathode for an electron tube is described that has little deterioration of emission current after long operation, is used as a long-life oxide cathode even with high current density in a CRT, and is economical. An emissive material is adhered onto a substrate that is positioned at one opening of a cylindrical sleeve having a built-in heater coil and that includes nickel as a main component by thermally decomposing carbonate including an alkaline earth metal oxide and at least one element selected from the group consisting of titanium, nickel, zirconium, vanadium, niobium and tantalum.

Abstract translation: 描述了一种用于电子管的阴极，其在长时间运行后几乎没有发射电流的劣化，甚至在CRT中具有高电流密度也被用作长寿命氧化物阴极，并且是经济的。 将发光材料附着到位于具有内置加热器线圈的圆柱形套筒的一个开口处的基底上，并且包括通过热分解包含碱土金属氧化物的碳酸盐和至少一种选自以下的元素的镍作为主要成分： 由钛，镍，锆，钒，铌和钽组成的组。

公开(公告)号：US5744905A

公开(公告)日：1998-04-28

申请号：US916747

申请日：1997-08-19

Applicant: Vivek Mehrotra ,  Hemant S. Betrabet ,  David Robert Woodward ,  Thomas O. Leyh ,  Susan McGee

Inventor： Vivek Mehrotra ,  Hemant S. Betrabet ,  David Robert Woodward ,  Thomas O. Leyh ,  Susan McGee

IPC: H01J1/142 ,  H01J61/067 ,  H01J1/62 ,  H01J17/20 ,  H01J61/12 ,  H01J63/04

CPC classification number: H01J61/0677 ,  H01J1/142

Abstract: The present invention is directed to new electrode structures for use in fluorescent lamps in which a tungsten base structure is provided with electron emissive materials including one or more of barium titanate, barium zirconate, barium strontium zirconate, barium cerium oxide, barium tantalate, and barium strontium yittrium oxide. Amounts of MgO may be added to improve or change emitter properties. A composite electrode structure can be formed by way of coating a tungsten coil with a slurry of this material, or providing powdered mixtures of both the electron emissive material and tungsten material and sintering this powdered material into a high density composite electrode structure.

Abstract translation: 本发明涉及用于荧光灯的新的电极结构，其中钨基结构设置有电子发射材料，该电子发射材料包括钛酸钡，锆酸钡，锆酸锶钡，钡钡钡和钡钡中的一种或多种 氧化锶钇。 可以加入MgO的量以改善或改变发射体性质。 可以通过用该材料的浆料涂覆钨线圈或者提供电子发射材料和钨材料的粉末混合物并将该粉末材料烧结成高密度复合电极结构来形成复合电极结构。