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

Patent metadata

Field	Value
Publication number	US-2020217383-A1
Application number	US-201816648803-A
Country	US
Kind code	A1
Filing date	Jul 27, 2018
Priority date	Sep 21, 2017
Publication date	Jul 9, 2020
Grant date	—

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

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 a 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 a 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 a 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 a 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

• F16D69/026

  containing fibres · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01G23/005

  Alkali titanates · CPC title

• C01G23/002 Primary

  Compounds containing titanium, with or without oxygen or hydrogen, and containing two or more other elements (C01G23/001, C01G23/003 take precedence) · CPC title

• C01B33/12

  Silica; Hydrates thereof, e.g. lepidoic silicic acid · CPC title