Spark plug resistance element and spark plug

Patent metadata

Field	Value
Publication number	US-12237650-B2
Application number	US-201917298427-A
Country	US
Kind code	B2
Filing date	Nov 26, 2019
Priority date	Dec 13, 2018
Publication date	Feb 25, 2025
Grant date	Feb 25, 2025

Abstract

A spark plug resistance element that includes at least one inorganic amorphous oxide and at least one first inorganic crystalline oxide having a relative dielectric permittivity of at most 15. A spark plug that includes at least one spark plug resistance element is also described.

First claim

What is claimed is:

1. A spark plug resistance element, comprising:
at least one inorganic amorphous oxide and at least one first inorganic crystalline oxide having a relative dielectric permittivity of at most 15;
wherein the spark plug resistance element include x mass % ZrO 2 , y mass % ZnO, and z mass % SnO 2 , where 0<x<0.99*c, 0<y<c and 0<z<c, where c=20 to 100 mass %, relative in each case to a total mass of the spark plug resistance element, and x+y+z=c.

2. The spark plug resistance element as recited in claim 1 , wherein the first inorganic crystalline oxide is selected from ZnO, SnO 2 , and mixtures thereof.

3. The spark plug resistance element as recited in claim 1 , wherein the inorganic amorphous oxide is a glass.

4. The spark plug resistance element as recited in claim 1 , wherein the inorganic amorphous oxide is a borosilicate glass.

5. The spark plug resistance element as recited in claim 1 , further comprising:
at least one second inorganic crystalline oxide, the second inorganic crystalline oxide being selected from ZrO 2 , TiO 2 , HfO 2 , and mixtures thereof.

6. The spark plug resistance element as recited in claim 1 , further comprising:
at least one inorganic non-oxidic material, the inorganic non-oxidic material being selected from carbon black, graphite, carbides, metals, and mixtures thereof.

7. The spark plug resistance element as recited in claim 6 , wherein: (i) the carbide is selected from silicon carbide, tungsten carbide, iron carbide, boron carbide, titanium carbide, zirconium carbide, hafnium carbide, vanadium carbide, niobium carbide, tantalum carbide, molybdenum carbide, and mixtures thereof, and/or (ii) the metal is selected from iron, tungsten, titanium, copper, silver, and mixtures thereof.

8. The spark plug resistance element as recited in claim 5 , wherein a total content of the first inorganic crystalline oxide and the second inorganic crystalline oxide is from 20 to less than 100 mass % relative in each case to a total mass of the spark plug resistance element.

9. The spark plug resistance element as recited in claim 5 , wherein a total content of the first inorganic crystalline oxide and the second inorganic crystalline oxide is from 40 to 80 mass % relative in each case to a total mass of the spark plug resistance element.

10. The spark plug resistance element as recited in claim 1 , wherein a content of the inorganic amorphous oxide is greater than 0 to 80 mass % relative in each case to the total mass of the spark plug resistance element.

11. The spark plug resistance element as recited in claim 1 , wherein a content of the inorganic amorphous oxide is greater than 10 to 30 mass % relative in each case to the total mass of the spark plug resistance element.

12. The spark plug resistance element as recited in claim 6 , wherein a content of inorganic non-oxidic material is greater than 0 to 20 mass % relative in each case to a total mass of the spark plug resistance element.

13. The spark plug resistance element as recited in claim 6 , wherein a content of inorganic non-oxidic material is greater than 0 to 10 mass %, relative in each case to a total mass of the spark plug resistance element.

14. A spark plug resistance element, comprising:
at least one inorganic amorphous oxide and at least one first inorganic crystalline oxide having a relative dielectric permittivity of at most 15;
wherein the spark plug resistance element includes x mass % ZrO 2 , y mass % ZnO, and z mass % SnO 2 , where 0<x<0.99*c, 0<y<c and 0<z<c, where c=40 to 80 mass %, relative in each case to a total mass of the spark plug resistance element, and x+y+z=c.

15. A spark plug, comrpising:
a spark plug resistance element including at least one inorganic amorphous oxide and at least one first inorganic crystalline oxide having a relative dielectric permittivity of at most 15;
wherein the spark plug resistance element includes x mass % ZrO 2 , y mass % ZnO, and z mass % SnO 2 , where 0<x<0.99*c, 0<y<c and 0<z<c, where c=20 to 100 mass %, relative in each case to a total mass of the spark plug resistance element, and x+y+z=c.

16. A spark plug, comprising:
a spark plug resistance element including at least one inorganic amorphous oxide and at least one first inorganic crystalline oxide having a relative dielectric permittivity of at most 15;
wherein the spark plug resistance element includes x mass % ZrO 2 , y mass % ZnO, and z mass % SnO 2 , where 0<x<0.99*c, 0<y<c and 0<z<c, where c=40 to 80 mass %, relative in each case to a total mass of the spark plug resistance element, and x+y+z=c.

17. The spark plug as recited in claim 15 , wherein the first inorganic crystalline oxide is selected from ZnO, SnO 2 , and mixtures thereof.

18. The spark plug as recited in claim 15 , wherein the inorganic amorphous oxide is a glass.

19. The spark plug as recited in claim 15 , wherein the inorganic amorphous oxide is a borosilicate glass.

20. The spark plug as recited in claim 15 , wherein the spark plug resistance element further comprises:
at least one second inorganic crystalline oxide, the second inorganic crystalline oxide being selected from ZrO 2 , TiO 2 , HfO 2 , and mixtures thereof.

21. The spark plug as recited in claim 15 , wherein the spark plug resistance element further comprises:
at least one inorganic non-oxidic material, the inorganic non-oxidic material being selected from carbon black, graphite, carbides, metals, and mixtures thereof.

22. The spark plug as recited in claim 21 , wherein: (i) the carbide is selected from silicon carbide, tungsten carbide, iron carbide, boron carbide, titanium carbide, zirconium carbide, hafnium carbide, vanadium carbide, niobium carbide, tantalum carbide, molybdenum carbide, and mixtures thereof, and/or (ii) the metal is selected from iron, tungsten, titanium, copper, silver, and mixtures thereof.

23. The spark plug as recited in claim 20 , wherein a total content of the first inorganic crystalline oxide and the second inorganic crystalline oxide is from 20 to less than 100 mass % relative in each case to a total mass of the spark plug resistance element.

24. The spark plug as recited in claim 20 , wherein a total content of the first inorganic crystalline oxide and the second inorganic crystalline oxide is from 40 to 80 mass % relative in each case to a total mass of the spark plug resistance element.

25. The spark plug as recited in claim 15 , wherein a content of the inorganic amorphous oxide is greater than 0 to 80 mass % relative in each case to the total mass of the spark plug resistance element.

26. The spark plug as recited in claim 15 , wherein a content of the inorganic amorphous oxide is greater than 10 to 30 mass % relative in each case to the total mass of the spark plug resistance element.

27. The spark plug as recited in claim 21 , wherein a content of the inorganic non-oxidic material is greater than 0 to 20 mass % relative in each case to a total mass of the spark plug resistance element.

28. The spark plug as recited in claim 21 , wherein a content of the inorganic non-oxidic material is greater than 0 to 10 mass %, relative in each case to a total mass of the spark plug resistance element.

Assignees

• Bosch Gmbh Robert

Inventors

• Braun Hubertus
• Reinsch Benedikt
• Kuenzel Carsten
• Vonau Corinna
• Kasjanow Helene
• Nufer Stefan

Classifications

• C03C2214/16

  Microcrystallites, e.g. of optically or electrically active material · CPC title

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title

• C03C14/006

  the non-glass component being in the form of microcrystallites, e.g. of optically or electrically active material · CPC title

• C03C4/00

  Compositions for glass with special properties · CPC title

• C03C3/04

  containing silica · CPC title