Patent ID: 7820138
Filing Date: 2010-10-26
Classification: B82Y,C01G,C01P,C04B

Abstract:
1. A method for producing an indium oxide powder, the method comprising the steps of: adding a basic precipitant to an indium salt solution to produce a precipitate; separating the precipitate by a solid-liquid separation; drying the separated precipitate; and calcining the dried precipitate in an inert gas atmosphere which contains a reducing gas and water vapor, wherein the concentration of indium in said indium salt solution is in the range of from 0.01 M to 3 M, and said basic precipitant is added to said indium salt solution in an amount of 0.5 to 3 equivalents per equivalent of the indium salt of said indium salt solution in an adding time of not longer than 24 hours while the solution is maintained at a temperature of 5 to 95° C., said dried precipitate being calcined at a temperature of 570 to 780° C.