Patent ID: 8592491

Claim:
A method for manufacturing a ceramic powder comprising: adding at room temperature a water-based rare earth metal carboxylate sol dispersed in water to a ceramic slurry, wherein the sol is formed by combining, with stirring, a carboxylate compound having at least three carboxyl groups with a rare earth metal compound in solution, the carboxylate compound is ammonium citrate, the rare earth metal is at least one member selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, the molar ratio of carboxyl groups to the rare earth metal is in the range of 1.2 to 2.40, and the ceramic is barium titanate, and forming a ceramic powder therefrom.