公开(公告)号：JPS6191822A

公开(公告)日：1986-05-09

申请号：JP21927285

申请日：1985-10-03

Applicant: Philips Nv

Inventor： HASKER JAN ,  VAN ESDONK JOHANNES ,  KWESTROO WIM

IPC: A47J31/44 ,  B65D79/00 ,  H01J1/14 ,  H01J1/28 ,  H01J9/04

CPC classification number: H01J9/047

公开(公告)号：EP0206422A1

公开(公告)日：1986-12-30

申请号：EP86201069

申请日：1986-06-19

Applicant: PHILIPS NV

Inventor： ZWIER JAN ,  VASTERINK JOHANNES HERMANNUS A ,  VAN ESDONK JOHANNES

IPC: H01J1/304 ,  H01J1/308 ,  H01J1/32 ,  H01J1/34 ,  H01J3/02

CPC classification number: H01J1/32 ,  H01J1/308 ,  H01J1/34 ,  H01J3/02 ,  H01J2201/3423

Abstract: @ In order to improve the stability of a cold cathode (5) of the reverse biased junction type, the vacuum space (2) is coupled with a reservoir (10), within which a source (21) of material reducing the work function, for example caesium, is present. By influencing the vapour pressure and the temperature in component parts (13, 16) of the reservoir (10) and in the source (21), loss of caesium due to adsorption or other phenomena occurring at the emitting surface (8) of the cathode (5) can be compensated for by an incident beam of caesium (25).

公开(公告)号：DE3889696D1

公开(公告)日：1994-06-30

申请号：DE3889696

申请日：1988-07-04

Applicant: PHILIPS NV

Inventor： VAN ESDONK JOHANNES ,  HASKER JAN ,  VAN LITH JOSEF JOHANNES

IPC: H01J1/28 ,  H01J9/04

Abstract: A cathode body for an impregnated scandate cathode is obtained by compressing and sintering a mixture of tungsten powder with approximately 0.5% by weight of scandium, whereafter the body is impregnated.

公开(公告)号：DE3567316D1

公开(公告)日：1989-02-09

申请号：DE3567316

申请日：1985-10-02

Applicant: PHILIPS NV

Inventor： HASKER JAN ,  HOKKELING PIETER ,  VAN ESDONK JOHANNES ,  VAN LITH JOSEF JOHANNES

IPC: H01J1/14 ,  H01J1/28 ,  H01J9/04

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 2 O 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 2 ) atmosphere;d) pulverizing the plug to fragments;e) heating said fragments to approximately 800°C and firing them at this temperature for a few to a few tens of minutes in a hydrogen atmosphere;f) grinding the fragments to scandium hydride-tungsten powder (ScH 2 /W);g) compressing a matrix or a top layer on a matrix of pure tungsten from said ScH 2 /W powder or from a mixture of this powder with tungsten powder;h) sintering and cooling the said matrix;i) bringing emissive material in the cathode, a scandate dispenser cathode is obtained the recovery of which after ion bonbardment occurs better than in cathodes having Sc 2 O 3 . The scandium is also distributed more homogeneously in the cathode than in cathodes having Sc 2 O 3 grains.

公开(公告)号：DE3364254D1

公开(公告)日：1986-07-31

申请号：DE3364254

申请日：1983-03-28

Applicant: PHILIPS NV

Inventor： VAN ESDONK JOHANNES ,  STOFFELS JACOBUS

IPC: B22F5/00 ,  H01J1/28 ,  H01J9/04

Abstract: When during the manufacture of a dispenser cathode a cathode body is first manufactured which comprises scandium oxide, and the emissive material is subsequently provided in the cathode, it is possible to obtain a larger scandium oxide concentration in the cathode surface. This results in a longer life and smaller sensitivity to ion bombardment of the cathode compared with the scandium oxide-containing cathodes known so far.

公开(公告)号：DE2860920D1

公开(公告)日：1981-11-05

申请号：DE2860920

申请日：1978-12-04

Applicant: PHILIPS NV

Inventor： JACOBS CORNELIS ADRIANUS JOANN ,  VAN ESDONK JOHANNES ,  RUTS JOSEPHUS MARIA

IPC: H01J61/54

公开(公告)号：CA1039343A

公开(公告)日：1978-09-26

申请号：CA249873

申请日：1976-04-08

Applicant: PHILIPS NV

Inventor： DE VRIES GERHARD H F ,  VAN ESDONK JOHANNES ,  GOOS THEUNIS

IPC: H01J17/40 ,  H01J17/49 ,  H01J17/48

Abstract: A gas-discharge display device having a number of cathodes connected in groups and at least one common anode. The cathodes are arranged in a row extending parallel to the anode. Each group of cathodes consists of spaced portions of a respective elongate conductor, the conductors being arranged in a staggered helix-like formation around a common core which has an insulating surface.

公开(公告)号：CA1020616A

公开(公告)日：1977-11-08

申请号：CA216025

申请日：1974-12-12

Applicant: PHILIPS NV

Inventor： VAN ESDONK JOHANNES ,  HORNMAN JOHANNES P

IPC: H01J17/49

Abstract: A gas discharge panel in which at least the electrodes serving as cathodes are separated from each other by partitions which consist of electrically oxidized aluminum strips which, like the cathodes, are also connected to a flat insulating plate by means of glaze.

公开(公告)号：CA1009290A

公开(公告)日：1977-04-26

申请号：CA178539

申请日：1973-08-10

Applicant: PHILIPS NV

Inventor： VAN ESDONK JOHANNES ,  HORNMAN JOHANNES P ,  BLUEKENS ANTONIUS M J ,  MATTHEIJ MATHIEU M M P

IPC: H01J17/02 ,  G09F13/20 ,  H01J9/26

公开(公告)号：CA969819A

公开(公告)日：1975-06-24

申请号：CA159150

申请日：1972-12-15

Applicant: PHILIPS NV

Inventor： VAN ESDONK JOHANNES ,  BLANK JOHANNES

IPC: C03C17/02 ,  C03C17/04 ,  C04B41/50 ,  C23D5/02 ,  G21C7/24 ,  H01J9/24 ,  H01J17/49