Title:
【発明の名称】真空バルブ用接点材料
Document Type and Number:
Japanese Patent JP2768721
Kind Code:
B2
Abstract:
A contact forming material for a vacuum interrupter comprising: from 25% to 65% by weight of a highly conductive component comprising Ag and Cu, and from 35% to 75% by weight of an arc-proof component selected from the group consisting of Ti, V, Cr, Zr, Mo, W and their carbides and borides, and mixtures thereof wherein the highly conductive component of the contact forming material comprises (i) a first highly conductive component region composed of a first discontinuous phase having a thickness or width of no more than 5 micrometers and a first matrix surrounding the first discontinuous phase, and (ii) a second highly conductive component region composed of a second discontinuous phase having a thickness or width of at least 5 micrometers and a second matrix surrounding the second discontinuous phase, wherein the first discontinuous phase in the first highly conductive component region is finely and uniformly dispersed in the first matrix at intervals of no more than 5 micrometers, and wherein the amount of the second highly conductive component region based on the total highly conductive component is within the range of from 10% to 60% by weight.
Inventors:
Okutomi Isao
Sekiguchi Kadan
Seki
Atsushi Yamamoto
Chiba Seiji
Mikio Okawa
Mitaka Homma
Noya Sato
Sekiguchi Kadan
Seki
Atsushi Yamamoto
Chiba Seiji
Mikio Okawa
Mitaka Homma
Noya Sato
Application Number:
JP4906689A
Publication Date:
June 25, 1998
Filing Date:
March 01, 1989
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
C22C5/08; C22C1/04; C22C14/00; C22C16/00; C22C27/02; C22C27/04; C22C27/06; C22C29/08; C22C29/14; H01H1/02; H01H33/66; H01H1/0233; (IPC1-7): C22C29/08; C22C14/00; C22C16/00; C22C27/02; C22C27/04; C22C27/06; C22C29/14; H01H33/66
Attorney, Agent or Firm:
Kazuo Sato (3 others)