Title:
スパークプラグの電極及びその製造方法、並びにスパークプラグ及びスパークプラグの製造方法
Document Type and Number:
Japanese Patent JP5345738
Kind Code:
B2
Abstract:
According to the present invention, there is produced at least one of a center electrode or a ground electrode, the electrode including a core formed of a composite material containing a matrix metal, the matrix metal being copper or a metal containing copper as a main component, and carbon dispersed in the matrix metal in an amount of 10 to 80 vol.%, the carbon having a thermal conductivity higher than that of the matrix metal; and an outer shell which surrounds the core and which is formed of nickel or a metal containing nickel as a main component. The thus-produced electrode exhibits favorable thermal conductivity and good heat dissipation, by virtue of the small difference in thermal expansion coefficient between the core and an outer shell. Therefore, a spark plug including the electrode exhibits excellent durability.
Inventors:
Tomoo Tanaka
Tsutomu Shibata
Takaaki Oniumi
Tsutomu Shibata
Takaaki Oniumi
Application Number:
JP2012534970A
Publication Date:
November 20, 2013
Filing Date:
August 24, 2011
Export Citation:
Assignee:
Nippon Special Ceramics Co., Ltd.
International Classes:
H01T13/20; C22C1/05; C22C1/10; C22C9/00; C22C47/14; H01T13/39; C22C101/10
Domestic Patent References:
| JPH0737678A | 1995-02-07 | |||
| JPH11154584A | 1999-06-08 | |||
| JP2007165291A | 2007-06-28 |
Attorney, Agent or Firm:
Yuriko Hamada
Shohei Oguri
Hironori Honda
Toshimitsu Ichikawa
Shohei Oguri
Hironori Honda
Toshimitsu Ichikawa