SYNTHETIC METHOD OF 100NM-SCALE CERIUM OXIDE FROM NEEDLE-LIKE CERIUM CARBONATE

摘要

PURPOSE: A method for manufacturing 100nm scale cerium oxide based on needle-shaped cerium carbonate is provided to improve the yield of the cerium oxide by controlling a reaction condition for forming the cerium carbonate. CONSTITUTION: A method for manufacturing a cerium oxide includes the following: 0.4 to 1M cerium chloride aqueous solution is stirred at temperature between 40 and 60 degrees Celsius, and ammonium bicarbonate is added(S110). Needle-shaped cerium carbonate is obtained by separating solid and liquid from the resultant of the cerium chloride aqueous solution and the ammonium bicarbonate(S120). The needle-shaped cerium carbonate is plasticized at temperature between 600 and 700 degrees Celsius to obtain needle-shaped cerium oxide(S130). Polyacrylic acid and 0.5 to 1M ammonia water are added to the needle-shaped cerium oxide to obtain cerium oxide grains, the average grain size of which is between 80 and 100nm.