PRODUCTION OF GRANULAR POTASSIUM OCTATITANATE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a granular potassium octatitanate suitable as a friction material for brakes. SOLUTION: This method comprises a first step of mixing a titanium compound convertible into titanium oxide by heating with a potassium compound convertible into potassium oxide by heating in 0.85-2.0 molar ratio of TiO2/K2O expressed in terms of oxides and baked at 700-940 deg.C and providing potassium dititanate, a second step of treating the potassium ditatanate obtained in the first step with water and then baking the treated potassium dititanate at 650-940 deg.C and a third step of dispersing the baked material obtained in the second step in water, adding an acid thereto so as to provide the dispersion with pH 6-8 neutralizing the dispersion and baking the resultant material at 200-800 deg.C.