Method for manufacturing composite ceramic material
AssigneePosco
InventorsSang-Moo Han, Do-Hyeong Kim, Joong-Hwan Jun
Life of this patent
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Abstract
Provided is a method of making a composite ceramic material for a fuel cell. The composite ceramic material for the fuel cell forms a cored structure where perovskite ceramic particles having a small particle diameter surround lanthanum cobaltite particles having a large particle diameter. Lanthanum cobaltite is added as a starting material in a process of synthesizing the perovskite ceramic particles. The composite ceramic material for the fuel cell made according to this method improves an electric connection characteristic between a separation plate and a polar plate of the fuel cell, and is chemically and mechanically stable.
Claims11
A method of manufacturing a composite ceramic material, comprising:
- adding a mixture where citric acid and lanthanum cobaltite powder are mixed with each other to a nitrate aqueous solution where a plurality of nitrates are dissolved to form a mixed solution containing a reactant in a sol state;
- heating and agitating the mixed solution to convert the reactant from a sol state to a gel state;
- heating the reactant in the gel state to a temperature of a self-ignition or more of the citric acid to combust the citric acid and produce chars;
- and
- pulverizing the chars produced by the combustion of the citric acid and then calcining the chars at 700° C. or more to form a calcined powder.
Dependencies are inferred from the claim text.