{
  "$type": "site.standard.document",
  "description": "Disclosed is a spark plug that prevents a sharp increase in resistance of a resistor and materializes an excellent load life performance. A spark plug (1) is provided with a resistor (7). The resistor (7) is formed by heat-sealing of a resistor composition (56) that contains, at least, a conductive…",
  "path": "/patents/999935",
  "publishedAt": "2012-08-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C03C8/02",
    "NGK SPARK PLUG CO [JP]"
  ],
  "textContent": "Disclosed is a spark plug that prevents a sharp increase in resistance of a resistor and materializes an excellent load life performance. A spark plug (1) is provided with a resistor (7). The resistor (7) is formed by heat-sealing of a resistor composition (56) that contains, at least, a conductive material (43) and glass powder. The glass powder contains between 35.0 mol% and 69.8 mol% SiO 2 , between 15.0 mol% and 49.8 mol% B 2 O 3 , between 5.0 mol% and 20.0 mol% Li 2 O, and at least one additive selected from MgO, CaO, SrO, BaO, Na 2 O, K 2 O, ZnO, and ZrO 2 in a total of between 2.6 mol% and 25.0 mol%. Further, the total content of Li 2 O and the additive (s) in the glass powder is between 15.2 mol% and 45.0 mol%, and the ratio of the Li 2 O content to the total content of the additive(s) is between 1.3 and 5.0.",
  "title": "SPARK PLUG FOR AN INTERNAL COMBUSTION ENGINE"
}