公开(公告)号：US20150125340A1

公开(公告)日：2015-05-07

申请号：US14554264

申请日：2014-11-26

Applicant: Kabushiki Kaisha Toshiba ,  Toshiba Materials Co., Ltd.

Inventor： Shinichi YAMAMOTO ,  Kayo NAKANO ,  Hiromichi HORIE

IPC: H01J1/144 ,  C22C27/04

CPC classification number: H01J1/144 ,  B22F5/12 ,  C22C1/045 ,  C22C1/1078 ,  C22C27/04 ,  C22C32/0052 ,  H01J23/05 ,  H01J61/0735 ,  H01J2201/30449

Abstract: According to one embodiment, a tungsten alloy includes 0.1 to 5 wt % of Zr in terms of ZrC.

Abstract translation: 根据一个实施方式，钨合金以ZrC计为0.1〜5重量％的Zr。

公开(公告)号：US5911919A

公开(公告)日：1999-06-15

申请号：US925842

申请日：1997-09-08

Applicant: Garth W. Billings

Inventor： Garth W. Billings

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

CPC classification number: H01J1/148 ,  H01B1/06 ,  H01J1/142 ,  H01J1/144 ,  H01J1/304

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. 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。 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。

公开(公告)号：US3944866A

公开(公告)日：1976-03-16

申请号：US458849

申请日：1974-04-08

Applicant: Michael Sayer

Inventor： Michael Sayer

IPC: H01J37/06 ,  C04B35/00 ,  H01J1/14 ,  H01J1/144 ,  H01J1/15 ,  H01B1/06 ,  H01J19/06

CPC classification number: H01J1/144

Abstract: A thermionic emitter for apparatus such as electron microscopes, scanning electron microscopes, and high power vacuum tubes which require a source of electrons formed from lanthanum strontium vanadate which is prepared from the compounds La.sub.(1.sub.-x) Sr.sub.(x) VO.sub.3, where x is the fraction of strontium (Sr) incorporated into LaVO.sub.3. The value of x lies between 0.1 and 0.4.

Abstract translation: 一种用于诸如电子显微镜，扫描电子显微镜和高功率真空管的装置的热离子发射器，其需要由化合物La（1-x）Sr（x）VO 3制备的钒酸镧锶形成的电子源，其中x 是掺入LaVO3中的锶（Sr）的分数。 x的值在0.1和0.4之间。

公开(公告)号：US11195686B2

公开(公告)日：2021-12-07

申请号：US17067734

申请日：2020-10-11

Applicant: Tsinghua University ,  HON HAI PRECISION INDUSTRY CO., LTD.

Inventor： Xin-He Yang ,  Peng Liu ,  Kai-Li Jiang ,  Shou-Shan Fan

IPC: H01J9/04 ,  H01J1/144 ,  H01J1/146 ,  H01J1/304

Abstract: A thermionic emission device comprises a first electrode, a second electrode, a single carbon nanotube, an insulating layer and a gate electrode. The gate electrode is located on a first surface of the insulating layer. The first electrode and the second electrode are located on a second surface of the insulating layer and spaced apart from each other. The carbon nanotube comprises a first end, a second end opposite to the first end, and a middle portion located between the first end and the second end. The first end of the carbon nanotube is electrically connected to the first electrode, and the second end of the carbon nanotube is electrically connected to the second electrode.

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：US4980141A

公开(公告)日：1990-12-25

申请号：US198303

申请日：1988-05-25

Applicant: Etsuji Kimura ,  Hisao Nakanishi

Inventor： Etsuji Kimura ,  Hisao Nakanishi

IPC: C01F17/00 ,  H01J1/14 ,  H01J1/144 ,  H01J35/06

CPC classification number: H01J35/06 ,  C01F17/0043 ,  H01J1/14 ,  H01J1/144 ,  C01P2004/42

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.

Abstract translation: 公开了六角双脒结晶钪氧化物粉末及其制备方法。 该方法包括在氯离子和铵离子存在下从含有钪的酸性水溶液中形成草酸钪，收集沉淀物并加热收集的沉淀物。 六角双吡啶结晶钪氧化物可用于制造阴极射线管的电子枪。

公开(公告)号：US1971076A

公开(公告)日：1934-08-21

申请号：US25873328

申请日：1928-03-03

Applicant: WESTINGHOUSE ELECTRIC & MFG CO

Inventor： LOWRY ERWIN F

IPC: H01J1/144

CPC classification number: H01J1/144

公开(公告)号：US12247317B2

公开(公告)日：2025-03-11

申请号：US17639805

申请日：2020-09-04

Applicant: THE JOHNS HOPKINS UNIVERSITY

Inventor： William A. Phelan ,  Tanya Berry ,  Mekhola Sinha ,  Tyrel Matthew McQueen

IPC: C30B13/16 ,  C30B29/30 ,  H01J1/144

Abstract: Metal oxides and method for forming the method oxides are provided. The disclosed functional metal oxides are single crystalline or polycrystalline metal oxides, such as, for example, SrVO3, and have dimensions, phase purity, and crystalline quality previously unachievable. The disclosed methods include a combination of a gas atmosphere, vacuum sintering, and laser-based directional solidification of a seed rod in contact with a feed rod that is scalable for production quantities.