{
  "$type": "site.standard.document",
  "description": "[Objective] To provide a technique for enhancing the heat transfer performance of a fusion portion and a noble metal tip. [Means for Solution] A spark plug has a center electrode having an electrode base member and an inner layer which is disposed in the electrode base member and which…",
  "path": "/patents/973932",
  "publishedAt": "2014-06-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02P13/00",
    "NGK SPARK PLUG CO [JP]"
  ],
  "textContent": "[Objective] To provide a technique for enhancing the heat transfer performance of a fusion portion and a noble metal tip. [Means for Solution] A spark plug has a center electrode having an electrode base member and an inner layer which is disposed in the electrode base member and which predominantly contains copper, and a noble metal tip disposed at a forward end of the center electrode, and a fusion portion formed between the noble metal tip, and the electrode base member and the inner layer. The fusion portion is in contact with the inner layer in a cross section which is parallel to the center axis of the center electrode and which passes through the center axis and the fusion portion. The fusion portion contains a component of the noble metal tip, a component of the electrode base member, and a copper component forming the inner layer.",
  "title": "SPARK PLUG"
}