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公开(公告)号：US6054802A
公开(公告)日：2000-04-25
申请号：US29032
申请日：1998-02-20
Applicant: Takuya Ohira , Masato Saito , Hiroyuki Teramoto
Inventor： Takuya Ohira , Masato Saito , Hiroyuki Teramoto
Abstract: Problems with a conventional cathode for electronic tubes arose because metals composing the substrate were subjected to heat deformation, resulting in a relatively lage drift of cutoff voltage. The present invention diminishes the heat deformation of the substrate to obtain a cathode with a small drift of cutoff voltage. Particularly, heat expansion coefficients can be made uniform while metals in the metal layer are prevented from diffusing into the substrate. This is done by incorporating the same metals present in the metal layer into the metals composing the substrate, thereby supressing deformation of the substrate.
Abstract translation: PCT No.PCT / JP97 / 01976 Sec。 371日期：1998年2月20日 102（e）1998年2月20日PCT 1997年6月10日PCT公布。 公开号WO97 / 49108 PCT。 日期1997年12月24日由于构成基板的金属受到热变形，导致电子管的常规阴极的问题，导致截止电压相对较大的漂移。 本发明减小了基板的热变形以获得具有小的截止电压漂移的阴极。 特别地，可以使热膨胀系数均匀，防止金属层中的金属扩散到基板中。 这通过将金属层中存在的相同金属掺入构成基板的金属中，从而抑制基板的变形。
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公开(公告)号：US5959395A
公开(公告)日：1999-09-28
申请号：US727619
申请日：1996-10-18
Applicant: Hiroshi Sakurai , Yoshiki Hayashida , Masayuki Kubo , Katsuyuki Yamashita
Inventor： Hiroshi Sakurai , Yoshiki Hayashida , Masayuki Kubo , Katsuyuki Yamashita
CPC classification number: H01J1/142
Abstract: A cathode for an electron tube formed by coating the base of the cathode for the electron tube with an alkaline-earth metal carbonate containing at least barium as the alkaline-earth metal, and thermally decomposing in a vacuum to generate an emitter mainly comprising an alkaline-earth metal oxide, wherein a mixture of two or more kinds of alkaline-earth metal carbonate crystalline particles having different shapes is used as the above mentioned alkaline-earth metal carbonate. Since the present invention can provide a cathode for electron tube having improved both cut-off drift and emission characteristic at the same time, it is useful as a cathode for the electron gun of a CRT, or a cathode for the electron gun of an electron microscope.
Abstract translation: PCT No.PCT / JP96 / 00493 Sec。 371日期：1996年10月18日 102（e）日期1996年10月18日PCT 1996年2月29日PCT PCT。 第WO97 / 32330号公报 日期1997年9月4日为电子管的阴极，通过用至少含有钡的碱土金属碳酸盐作为碱土金属涂布电子管的阴极的基底而形成，并且在真空中热分解以产生 主要包含碱土金属氧化物的发射体，其中使用两种或更多种具有不同形状的碱土金属碳酸盐结晶颗粒的混合物作为上述碱土金属碳酸盐。 由于本发明可以提供同时具有改进的截止漂移和发射特性的电子管阴极，因此可用作CRT的电子枪的阴极或用于电子的电子枪的阴极 显微镜。
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公开(公告)号：US5698937A
公开(公告)日：1997-12-16
申请号：US393534
申请日：1995-02-23
Applicant: Gyu-nam Ju , Jong-seo Choi , Keun-bae Kim , Kwang-min Lee , Kwi-seok Choi
Inventor： Gyu-nam Ju , Jong-seo Choi , Keun-bae Kim , Kwang-min Lee , Kwi-seok Choi
CPC classification number: H01J1/142
Abstract: A cathode for an electron tube has a layer of electron-emissive substance containing alkaline earth metal carbonates having capillary crystals, to which 0.01-20.0 wt % of both a lanthanum (La) compound and a magnesium (Mg) compound or an La--Mg compound, based upon the weight of the alkaline earth metal carbonate, is added. The cathode enjoys full interchangeability with a conventional oxide cathode and a 15-20% longer lifetime.
Abstract translation: 用于电子管的阴极具有含有具有毛细晶体的碱土金属碳酸酯的电子发射物质层，镧（La）化合物和镁（Mg）化合物或La-Mg两者的0.01-20.0重量％ 加入基于碱土金属碳酸盐的重量的化合物。 阴极与常规氧化物阴极完全互换，寿命长达15-20％。
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公开(公告)号：US5059856A
公开(公告)日：1991-10-22
申请号：US439994
申请日：1989-11-21
Applicant: Petrus J. A. M. Derks
Inventor： Petrus J. A. M. Derks
CPC classification number: H01J1/142
Abstract: The lifetime of oxide cathodes comprising, for example BaO and SrO as an emissive material, is improved by adding hafnium oxide or zirconium oxide.
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25.发明授权Vacuum electron tube having an oxide cathode comprising chromium reducing agent 失效具有包含铬还原剂的氧化物阴极的真空电子管
公开(公告)号：US4904896A
公开(公告)日：1990-02-27
申请号：US675226
申请日：1984-11-27
Applicant: Kenneth K. T. Chiang
Inventor： Kenneth K. T. Chiang
Abstract: In a vacuum electron tube, a novel oxide cathode comprising a metal substrate, means for heating said substrate to its operating temperature, and a layer of alkaline-earth-metal oxide on the substrate. The substrate is essentially free from silicon and contains operative concentrations greater than 1.0 weight % of chromium metal for progressively migrating into the oxide layer and reducing the oxide to yield alkaline-earth-metal.
Abstract translation: 在真空电子管中，包括金属基板的新型氧化物阴极，用于将基板加热至其工作温度的装置和基底上的碱土金属氧化物层。 基材基本上不含硅，并且含有大于1.0重量％的铬金属的操作浓度，用于逐渐迁移到氧化物层中并还原氧化物以产生碱土金属。
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Patent Agency Ranking
公开(公告)号：US2916652A
公开(公告)日：1959-12-08
申请号：US48625855
申请日：1955-02-04
Applicant: RAYTHEON CO
Inventor： JAMES CARDELL , HILL FREDERICK T
IPC: H01J1/142
CPC classification number: H01J1/142
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公开(公告)号：US2830027A
公开(公告)日：1958-04-08
申请号：US54815555
申请日：1955-11-21
Applicant: CSF
Inventor： JEAN SCHWEITZER
IPC: H01J1/142
CPC classification number: H01J1/142
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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
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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
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公开(公告)号：US12227829B2
公开(公告)日：2025-02-18
申请号：US18007173
申请日：2021-07-20
Applicant: PLANSEE SE
Inventor： Bernhard Mayr-Schmoelzer
Abstract: A high-temperature component made of a refractory metal or a refractory metal alloy, includes a coating for increasing thermal emissivity. The coating is formed substantially of tungsten and rhenium, i.e. of at least 55 wt. % rhenium and at least 10 wt. % tungsten, and has a Re3W phase of at least 35 wt. %. A process for producing a high-temperature component having a coating for increasing thermal emissivity, is also provided.
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