Title:
SPHERICAL ALKALI METAL HEXATITANATE POWDER AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3393277
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce a spherical alkali metal hexatitanate powder which is useful as a friction material, filler of a resin or coating material, or the like.
SOLUTION: This powder consists of spherical particles in which crystal grains of an alkali metal hexatitanate (M2Ti6O13 wherein M is an alkali metal) are bonded to each other through an alkali metal silicate (M2SiO3) and the molar ratio of (M2Ti6O13)/(M2SiO3) is 1/0.02 to 1/0.5. Accordingly, the alkali metal hexatitanate crystal grains which are constituents of the spherical particles, have high bond strength to each other and high breaking strength. In this production, a powdery titanium compound, a powdery alkali metal compound and a powdery silicon compound are mixed in ratios enough to provide TiO2/M2O/SiO2 molar ratios of 6/(1+x)/x (wherein x is 0.02 to 0.5) to obtain a powdery mixture and then, the powdery mixture is granulated into granules and thereafter, the granules are subjected to calcination treatment at 700 to 1,300°C to produce the objective powder.
Inventors:
Kenji Higashi
Application Number:
JP18872795A
Publication Date:
April 07, 2003
Filing Date:
July 25, 1995
Export Citation:
Assignee:
Kubota Corporation
International Classes:
C01G23/00; C09K3/14; (IPC1-7): C01G23/00
Domestic Patent References:
| JP1131027A | ||||
| JP753214A |
Attorney, Agent or Firm:
Shinpachiro Miyazaki