Alkali metal titanate, method for producing alkali metal titanate, and friction material

Patent metadata

Field	Value
Publication number	US-11566677-B2
Application number	US-201816648803-A
Country	US
Kind code	B2
Filing date	Jul 27, 2018
Priority date	Sep 21, 2017
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

Provided is an alkali metal titanate which, when used as a constituent material of a friction material, is excellent in heat resistance and friction force and capable of effectively suppressing wear of a mating material disposed to face the friction material. The alkali metal titanate includes a sodium atom and a silicon atom. The content of the sodium atom is 2.0 to 8.5 mass %. The content of the silicon atom is 0.2 to 2.5 mass %. The ratio of the content of an alkali metal atom other than the sodium atom to the content of the sodium atom is 0 to 6.

First claim

The invention claimed is:

1. An alkali metal titanate, comprising a sodium atom and a silicon atom,
wherein a content of the sodium atom is 2.0 to 8.5 mass %,
a content of the silicon atom is 0.2 to 2.5 mass %, and
a ratio of a content of an alkali metal atom other than the sodium atom to the content of the sodium atom is 0 to 6 in mass ratio.

2. The alkali metal titanate according to claim 1 ,
wherein the silicon atom is contained in a form of a silicon oxide or a silicate.

3. The alkali metal titanate according to claim 1 ,
wherein the alkali metal atom other than the sodium atom is at least one selected from a lithium atom and a potassium atom.

4. A method for producing the alkali metal titanate according to claim 1 , comprising the steps of:
mixing a titanium raw material, an alkali metal raw material containing the sodium atom, and a silicon raw material; and
calcining a resulting mixture.

5. The method for producing the alkali metal titanate according to claim 4 ,
wherein the alkali metal raw material is an alkali hydroxide, an alkali carbonate, or an alkali-containing mineral.

6. A friction material which is a material containing 5 to 60 mass % of the alkali metal titanate according to claim 1 .

7. The alkali metal titanate according to claim 2 ,
wherein the alkali metal atom other than the sodium atom is at least one selected from a lithium atom and a potassium atom.

8. A method for producing the alkali metal titanate according to claim 2 , comprising the steps of:
mixing a titanium raw material, an alkali metal raw material containing the sodium atom, and a silicon raw material; and
calcining a resulting mixture.

9. A method for producing the alkali metal titanate according to claim 3 , comprising the steps of:
mixing a titanium raw material, an alkali metal raw material containing the sodium atom, and a silicon raw material; and
calcining a resulting mixture.

10. A method for producing the alkali metal titanate according to claim 7 , comprising the steps of:
mixing a titanium raw material, an alkali metal raw material containing the sodium atom, and a silicon raw material; and
calcining a resulting mixture.

11. The method for producing the alkali metal titanate according to claim 8 ,
wherein the alkali metal raw material is an alkali hydroxide, an alkali carbonate, or an alkali-containing mineral.

12. The method for producing the alkali metal titanate according to claim 9 ,
wherein the alkali metal raw material is an alkali hydroxide, an alkali carbonate, or an alkali-containing mineral.

13. The method for producing the alkali metal titanate according to claim 10 ,
wherein the alkali metal raw material is an alkali hydroxide, an alkali carbonate, or an alkali-containing mineral.

14. A friction material which is a material containing 5 to 60 mass % of the alkali metal titanate according to claim 2 .

15. A friction material which is a material containing 5 to 60 mass % of the alkali metal titanate according to claim 3 .

16. A friction material which is a material containing 5 to 60 mass % of the alkali metal titanate according to claim 7 .

Assignees

• Toho Titanium Co Ltd

Inventors

• Taki Daisuke
• Sakai Hideki

Classifications

• F16D69/027 Primary

  Compositions based on metals or inorganic oxides · CPC title

• F16D2200/0043

  Ceramic base, e.g. metal oxides or ceramic binder · CPC title

• F16D2200/0086

  Moulding materials together by application of heat and pressure · CPC title

• C01P2002/52

  containing elements as dopants · CPC title

• C01B33/32

  Alkali metal silicates ({C01B33/24} , C01B33/26 take precedence) · CPC title