IP Library › Granted Patent US 8,877,099
Granted Patent B2
US 8,877,099 · App. 13/358,887 · Granted Nov 4, 2014

Ti

Inventors: Tetsuya Hattori (Konan, JP); Takafumi Kimata (Gamagori, JP); Yoshimasa Kobayashi (Nagoya, JP)
Assignee: NGK Insulators, Ltd.
H01T13/39C04B2235/404C04B2235/3817C04B37/001C04B2235/658C04B2237/36C04B2237/405C04B2235/80C04B35/5615C04B2235/3891C04B2235/77C04B2235/402C04B2235/428C04B35/5618C04B37/021H01T21/02C04B2237/343C04B35/645C04B2235/661C04B2235/48C04B2235/9607C04B2235/3843
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Quick Facts
Patent No.
US 8,877,099
App. No.
13/358,887
Granted
Nov 4, 2014
Kind
B2
Abstract

The present invention provides a Ti 3 SiC 2 based material that exhibits excellent arc resistance, an electrode, a spark plug, and methods of manufacturing the same. A Ti 3 SiC 2 based material according to the present invention includes Ti 3 SiC 2 as a main phase, the Ti 3 SiC 2 based material having a TiC content of 0.5 mass % or less and an open porosity of 0.5% or less. It may be preferable that 0 to 30 mol % of Si in the main phase Ti 3 SiC 2 be substituted with Al. A spark plug according to the present invention includes an electrode formed using the Ti 3 SiC 2 based material.

Claims (11)

1. A Ti 3 SiC 2 based material comprising Ti 3 SiC 2 as a main phase, the Ti 3 SiC 2 based material having a TiC content of 0.4 mass % or less, a TiSi 2 content of 3 mass % or less and an open porosity of 0.5% or less.

2. The Ti 3 SiC 2 based material according to claim 1 , the Ti 3 SiC 2 based material having Al in substitution of greater than 0 mol % up to 30 mol % of Si in the main phase Ti 3 SiC 2 .

3. The Ti 3 SiC 2 based material according to claim 1 , the Ti 3 SiC 2 based material having a Ti 5 Si 3 content of 8 mass % or less.

4. The Ti 3 SiC 2 based material according to claim 1 , the Ti 3 SiC 2 based material having a SiC content of 5 mass % or less.

5. The Ti 3 SiC 2 based material according to claim 1 , the Ti 3 SiC 2 based material having a thermal conductivity of 25 W/mK or more.

6. The Ti 3 SiC 2 based material according to claim 1 , the Ti 3 SiC 2 based material having a bending strength of 200 MPa or more.

7. The Ti 3 SiC 2 based material according to claim 1 , the Ti 3 SiC 2 based material having a coefficient of thermal expansion of 7 to 9 ppm/K.

8. The Ti 3 SiC 2 based material according to claim 1 , the Ti 3 SiC 2 based material having a volume resistivity of 1×10 −4 Ω·cm or less.

9. The Ti 3 SiC 2 based material according to claim 1 , wherein an oxide film formed when allowing the Ti 3 SiC 2 based material to stand at 1000° C. for 5 hours under atmospheric pressure has a thickness of 40 μm or less.

10. An electrode formed by using the Ti 3 SiC 2 based material according to claim 1 .

11. A spark plug formed by using the electrode according to claim 10 .

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 10, 2012
From: HATTORI, TETSUYA; KIMATA, TAKAFUMI; KOBAYASHI, YOSHIMASA
To: NGK INSULATORS, LTD.
Reel/Frame 028015/0901 →
Continuity (2)
Provisional Application 61436262 · Jan 26, 2011
Related Publication 20120186723A1 · Jul 26, 2012