Title:
SPARK PLUG
Document Type and Number:
WIPO Patent Application WO/2020/095526
Kind Code:
A1
Abstract:
Provided is a spark plug such that separation and wear of a discharging member connected to a base material can be suppressed. This spark plug has a base material to which at least a portion of a discharging member is connected via a diffusion layer, the base material comprising 50 mass% or more of Ni, 8 to 40 mass% of Cr, 0.01 to 2 mass% of Si, 0.01 to 2 mass% of Al, 0.01 to 2 mass% of Mn, 0.01 to 0.1 mass% of C, and 0.001 to 5 mass% of Fe. The discharging member comprises at least Pt out of a P group (Pt, Rh, Ir, and Ru) and Ni. (K+L)/(M+N)≤1.14 is satisfied, where K is the atom concentration of the P group of the discharging member, L is the atom concentration of the P group of the base material, M is the atom concentration of Ni of the discharging member, and N is the atom concentration of Ni of the base material.
Inventors:
SUMOYAMA DAISUKE (JP)
ITO KAZUKI (JP)
ITO KAZUKI (JP)
Application Number:
PCT/JP2019/034509
Publication Date:
May 14, 2020
Filing Date:
September 03, 2019
Export Citation:
Assignee:
NGK SPARK PLUG CO (JP)
International Classes:
H01T13/39; H01T13/20; H01T21/02
Foreign References:
| JP2003105467A | 2003-04-09 | |||
| JP2007173116A | 2007-07-05 |
Attorney, Agent or Firm:
PATENT FIRM SHINMEI CENTURY (JP)
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