EP 0470910 B1 19970507 - Process of manufacturing an electrical insulating material with a vacuum high break down voltage
Title (en)
Process of manufacturing an electrical insulating material with a vacuum high break down voltage
Title (de)
Verfahren zur Herstellung eines elektrischen Isolierungsmaterials mit einer im Vakuum hohen Durchbruchspannung
Title (fr)
Procédé de fabrication d'un isolant électrique à tension de claquage élevée sous vide
Publication
Application
Priority
FR 9010258 A 19900810
Abstract (en)
[origin: EP0470910A1] Process for manufacturing an electrical insulator (5) immersed in an intense electrical field, especially between two electrodes (1 and 2) of an electron tube. The insulator (5) is a crystalline body whose free surfaces (7) under vacuum (6) have been treated so as to reduce or eliminate crystallisation defects. The treatment is controlled by measuring a property, especially an optical or mechanical property, of the free surfaces. The breakdown voltage can be multiplied by three or four in relation to conventional insulators and can approach the breakdown voltage of the vacuum. <IMAGE>
IPC 1-7
IPC 8 full level
H01B 17/50 (2006.01); H01B 19/04 (2006.01)
CPC (source: EP US)
H01B 17/50 (2013.01 - EP US); H01B 19/04 (2013.01 - EP US)
Citation (examination)
"Techniques de l'ingénieur, Essais Mécaniques M127, 1et4 à 7;M128 1."
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0470910 A1 19920212; EP 0470910 B1 19970507; DE 69125987 D1 19970612; DE 69125987 T2 19971204; FR 2665794 A1 19920214; FR 2665794 B1 19950210; US 5232640 A 19930803
DOCDB simple family (application)
EP 91402208 A 19910808; DE 69125987 T 19910808; FR 9010258 A 19900810; US 74318891 A 19910809